I'm refraining from voting, since I'm posting about a technical aspect and haven't decided on the entertainment value of the run.
There are two things that I've seen on the run so far:
(1) There is a lack of understanding when it comes to advanced real-time speedrunning strats for even New Super Mario Bros. Wii. For example, in 1-7 with the penguin suit, you can use it on land to boost your speed in short spurts (even when you're not on ice). However, the runner does not use this to their advantage. Watching some ILs of the original or maybe the hack (I'm not entirely sure) may have made the runner aware of this in advance. Because they did not, it is absent from the run. Link posted of an IL from New Super Mario Bros Wii for an example:
https://www.youtube.com/watch?v=n3BGl3v3tts
(2) There are some moments that feel like real-time speedrunning as opposed to TAS. One specific example that comes to mind is 2-T's Pipeline Tower with the use of the Propeller Cap. When using the Propeller Cap, there is some delay before you can use it again. You want to minimize that delay as much as possible so that you can move again immediately after when landing on the platform. This is key in saving frames in regular RTS/RTA runs and especially so in TAS runs, but the runner here does a jump or hop before spinning, adding some delay before the next Propeller spin. Basically, what I'm saying here is that after initiating a propeller spin, you want to land right on the platform at the peak of your spin without dropping at all. This is very doable in a TAS run (I would think).
I have yet to watch the rest of the run, but this is less than 20 minutes into the run, and it's not very favorable from a technical stance. As far as anything extra entertaining besides that, nothing has been very show-off'y either to impress me. That is all.