Plain and Simple.
Ozkansas always has Epic TT fights, as well as the smaller TT map...along with great GV fights! and Trinity has 135, 20 v 20 GV fights of pure epicness (when it's not totally camped) also trinity still has a lot of great choke points making for great furballs!
Well, for the same reason you like OzKansas, I dislike it - however I am also fond of the mega-fight effort over TT.... see, what I see is a massive map (20x20 sectors?), with barely 2-square sectors of "good" and over 198 of... well "can be utilised better". Nobody cares about the 198 sectors... well, they do "care", but they "care" about the single one in the middle 20-times
more.
Same arguement can be made for Trinity, the horde battles get prety epic there and can be a blast, however no progress on the map can not be made when you have one enemy horde to work against, and a firendly horde not very interested in working with you.
If you think about it, what you like the most can and very likely will still continue to happen in this game, even if these two maps are changed or removed. But if you don't think so, please elaborate.