Hill 400 is just a slugfest in mid, far ways to cut, very campy map
Has more to do with Cancerous Gamem-Mode than Mapping per se. 2vs2(there it is Map-depending), 3vs3(very, very map-depending) and 4vs4(always) is either Spam/Slug-Fest or Camping. And even with more symmetrical Faction-balance(like in Age of Empires 2 e.g., where Differences beetween factions are rather Cosmetic(Buffs/Debuffs, pseudo-unique-Units) instead) with more than 4 Players(2vs2) it turns into fucking Command and Conquer Red-Retard-Style Spammin' and Hammin' (Any Blobbing-Haters would probably get a heart-attack if they would have played C&C Red Alert or Generals back in the days, those Games had only that as viable strategy if you failed to Rush your opponent(which is just another form of laming)