First yes very easily though Tyler Smith is likely around 20m per year. However do not forget that Micah will not see his 33-35m per year for another 3 years and Tyler not for another 4 years. Martin by that time will not be making 18m per year. At that point he will either be far cheaper, retired, or on another team because a 35-36 year old guard is not going to be making 18m per because as much as it hurts to say it is unlikely that at that age he will be an elite all pro G anymore.
Next up we can talk about the RZ offense. The last 2 years the Cowboys were one of the top RZ offenses in the NFL. Therefore either Dak and the offense, who are largely the same players, have either completely forgotten how to play in the RZ or MM is not good at RZ offense. The latter seems FAR more likely considering the circumstances. The idea also that an 8 a 10 or even a 15 year veteran is not going to make a couple boneheaded throws every single game is a fiction. Stafford does it, Burrow does it, Brady and Manning would do it, and even Rodgers and Mahomes do it and those are all wildly different generations of QB. The only way to avoid that is to play the soft "afraid to lose" style that MM was playing which will get you regular season wins but does not work well in winning games in the playoffs .
The thing about Lance is he is not a top 50 NFL QB. He lost a backup job to Sam Darnold when the 49ers had every reason to favor him, due to the amount they invested into him and yet they still saw how horrible he looked, some of which we got to see, and went "this is not fixable and we cannot make this work". The idea that Trey Lance can be good is based purely around draft hype. There is zero basis based on anything that has been shown of him as a QB for the past 3 years. He had a good college year in 2019 and then did not play in 2020 and then looked bad in San Francisco for 2 years before losing both the starting and backup jobs. The only thing starting Lance does is mean you go from having Super Bowl potential and a 10-12 win team to a 6-7 win team watching the playoffs.