Alshar, Ellyrion and another two or three players who have the courage to do something make up 97% of Tilea's power, the vast majority are cowards who love to show off titles but don't know anything about combat. Kings with domains that look like slums, dukes with 5k pop, anyway, it's a mess.
Trannywood deserves some credit for being online all day creating domains that will later become tilea bases, otherwise he's irrelevant.
Rome is a power as solid as jelly, they live off the renown they received in the past because they did something interesting that no one remembers anymore.
If you're so sure of Tilea's power ask your emperor to send the worthless dubh to promote some enemy kingdoms, then you'll have competition, but it seems like it's pretty easy to flaunt your power when that worthless pope is holding back all enemy promotions in the game.