They don't look particularly cool or interesting, more like a floating vagina/womb in space minus the ovaries.  Advent aren't related to the anime series Gundam Wing. So, if that ugly vaguely humanoid design is anything other then early drafts of the advent titan there will be a bored sigh following rebellions release.  A cool looking flying saucer/oldschool cylon base star mix would look about 100 times better then anything the developers have shown us regarding advent titans.  A sphere with glowing hull lines would also similarly keep my interest as the other advent titan.  Hopefully they will just change the designs, but I figure it to be too late.

But its all moot anyways right? the TEC will just be able to turtle forever, the vasari will be able to relocate wherever they darn well feel like it having no empire weaknesses, and the advent might be able to take over a planet...whatever that means.  Advent titan should have a blanket "mind control" ability that would over time mind control ANYTHING.  By anything i mean planets, titans, starbases, anything.  As the titan levels up it increases the amount of things that it can keep mind controlled.  This would be through the use of culture, which the titan would also emit.  This would be a fun way to play advent end game, and really give those advent super "weapons" a really nice combo so that they might actually be built for combat, instead of lols.  It wouldn't be overpowered, as the other races have very strong abilities as well.  I like the idea of this ability as I have outlined it, because it means that no matter the situation, the advent titan will ALWAYS strike fear into your opponents heart, even if it looks like a vagina/womb.

Edit: okay okay, that advent titan DOES have the ovaries.