If a Doom TAS were to be included in the RFN list for the game's notoriety and the nostalgia people have for it, I think it would make more sense to wait for a run of an official release like Doom II that people would recognize, rather than a lesser known WAD like The Plutonia Experiment.
That aside, there are two runs on the RFN list that have always stood out as questionable to me:
[2078] SNES Super Metroid "Reverse Boss Order" by Saturn in 46:42.38 and
[1649] NES Mega Man 2 by aglasscage, finalfighter, pirohiko & Shinryuu in 23:48.51.
From what I understand, Super Metroid RBO was included on the basis that a newcomer would be blown away by the concept of a TAS beating the bosses in the reverse order, but since this is something that even RTAers can do, and since most newcomers would likely be privy to this because of the game's popularity at the GDQ marathons, I don't think this fact in and of itself makes the TAS impressive. What does make it impressive to me is all of the item route planning, health management, and constant drop manipulation required to make it through Norfair and Lower Norfair without wasting any time picking up extraneous upgrades earlier in the run.
This aspect of the run, though, has significant overlap with one of the other movies in the RFN list in
[3216] GBA Castlevania: Aria of Sorrow "all souls" by Fz-Last, klmz & Pike in 17:06.41, since that run constantly has to manage mana for Giant Bat zips and manipulate heart drops wherever possible, the same as SM RBO does with health.
My rationale for questioning the MM2 TAS being on the list is essentially the same as for SM RBO: its reasons for being there are because it does things that RTAers already do, and that one of the other RFN movies does. The majority of the zips in that run are also done by speedrunners, there are well over a hundred runners who run the categories that allow zips, and the frame windows to execute them are not all that demanding. Compare this to the bat zips in Aria of Sorrow which are at least double frame perfect, triple frame perfect if you do the quick setup, and in some categories will cause a reset if you miss even one of these inputs due to strict mana constraints, and the all souls TAS does way more zips and much more difficult zips than what is possible in real-time.
I realize that many newcomers may not be knowledgeable about the intricacies on the difficulty of zips in the two different games, but I think anyone who compares the MM2 TAS to
an MM2 RTA side-by-side will two runs that are significantly more similar to each other than AoS TASes and RTAs. And personally, I can hardly tell TAS and RTA apart for the majority of the MM2 run since it's mostly a walkathon, and does almost all of the same zips.