In expert analysis, the young playmaker has shown why he deserves the first-choice spot for the national team's number ten versus the All Blacks on Saturday.
The Northampton Saints star delivered arguably the best defensive performance observed from an England playmaker in several years.
His courageous approach by consistently making defensive hits against an aggressive Fiji side was impressive.
His tactical control was also immense - he demonstrated a perfect blend of skill and control, and made several crucial choices when things didn't proceed to plan during the opening period.
His ability to settle the team strategically while making big calls represents an aspect he has truly mastered.
From my perspective, the young fly-half is England's number one fly-half and deserves to start versus the All Blacks next week.
I believe the manager the England coach sees it similarly as well, since Smith has demonstrated he can perform in big international games.
The experienced fly-half started the previous weekend against Australia due to captaincy reasons, with some aspect of that choice aimed at ensuring consistency and reward his performance from the tour of Argentina.
But England's performance against Fiji was a significant step up from the performance against Australia.
The Wallabies lost in Italy last weekend, so we should avoid becoming too carried away about that victory, which should have been by a larger margin considering how off the pace Australia were.
The Fijian team, on the other hand, proved significantly dangerous while offering a much more difficult test.
Fin Smith remains just twenty-three - looking ahead 24 months, with Ford pushing him but also offering support, I believe Smith will find himself in a very strong position in his career.
Marcus Smith must also be regarded as a possibility when appropriate and against suitable opponents.
He is developing in his career while beginning to establish himself, though he needs the freedom to show his distinctive attributes.
The All Blacks brought on their impact player, who scored the decisive try defeating the Scottish team, demonstrating the importance of possessing players who can make a real impact as substitutes.
That kind of presence might represent the difference separating victory the global tournament from failure.
The All Blacks substitute observes the match develop while substituted and thinks about how he can make an impact when he comes on.
His decision-making and mistake frequency have enhanced substantially from his initial professional days.
Should we develop Smith to be such type influential performer, then having him among substitutes could be beneficial.
However, at the moment I believe Marcus is the answer in the number fifteen position, so that is a role that is still unclaimed.
New Zealand are likely to punt to challenge the English defensive line, so it has to be impenetrable.
This role that needs transforming into a real strength, in defense and in terms offensive transitions threat.
Right now, I don't think Marcus functions as full-back at the highest level.
I struggle to see the benefit of playing him there.
I prefer the ball in his hands frequently, though I think that should be in the front line, particularly in the final quarter.
There are obviously numerous similarities between Ford with Smith.
Fin has the ability executing right decisions under pressure - his instincts represent traits that can be coach.
I recall when he got possession at one stage just inside his territory appearing that opportunity existed should they spread play.
However during these split-seconds he thought the team required to turn the opposition as we are leading points-wise, so he kicked it to pin the opponents and turn pressure.
This represents the type of fly-half play securing championships and wins World Cups.
He also has composure during intensity to organise the players nearby, and the understanding that he doesn't always need as primary option.
I hope to witness him receiving the opportunity to show that at the highest standards soon, just as we have seen George Ford accomplish, particularly during domestic matches repeatedly and week out.
During the South American tour, Ford similarly excelled in difficult circumstances, where historically you could argue there have been times he has not quite delivered during extremely tense games.
I believe we have playmaking options who can do the role, but with Fin's defence on top of everything else, establishes him as the better-rounded versatile player.
This also indicates you don't have to modify your defensive system when you have someone aggressive occupying the playmaker channel, rather than someone who is somewhat passive.
You could also present compelling arguments favoring Ford beginning with Smith coming off substitution.
Numerous considerations that go on privately, however the coaches choose to proceed, this will present the opponents problems.
That has not always been the narrative against the All Blacks, where the focus was simply on selecting the right player.
This time, whichever fly-half selected can put the All Blacks under real pressure.
Smith's capacity to pick optimal kicks while delivering enabling possible 50-20 can take all the stress off the national team.
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