I haven't played on every map here, but these are the ones I'd at least look at switching to Casual or another category. I think if any of these were in a competitive map pool, I'd have to draft a bit differently as some armies would not be as effective as others. Looking back through the online tournaments, I believe none of these were used except for Grundy's Grave.
Grundy's Grave - Height right next to the start zone makes camping an easy and good strategy. Not sure if that's enough to disqualify it, but I just don't like this map.
Ravaged Road - Height is completely inaccessible to double-spaced figures.
HYDRA Base Gehenna,
Moon Base Alpha,
Platforms 5 and 6,
Sauron's Eyrie - All are pretty punishing towards melee non-fliers and very rewarding for ranged fliers. Some are worse than others - but any of the ones with 2 tiers of castles I can't imagine are balanced against non-fliers.
Rocket Launching Platform,
Tri-ways War Zone - Both designed for 3 players. Probably just need a separate category? Shouldn't have these in the same pool as 2-player competitive maps. I dig that these exist and would love to see more.
Muspelheim Melee - Designed for 4 players, but it says it works fine as a 2-player map. I don't think I've played this one (it looks fine), but my suggestion would be clarifying which start zones are used for 2 players if this is an acceptable map for 2 players.
I would also suggest including
Wargrounds of Scape in the OP as acceptable testing maps, as that group is basically the new BoV.