Those Texture Updates and Splash Arts really slowed down...

Hey Riot! hoping i could get one of you guys in here, but i was wondering, whats up with those TU's and Splash Updates? there was that one time where you guys were rolling out new art left and right, and then textures as well. I thought that was going out pretty much across the board for all champs that needed it?

now obviously i dont work in the art department, but im not blind, and i can tell you right now, Leo definitely needs a new base splash, and guys like Nunu need a TU.

at least with Nunu, im assuming you may rework him? i dunno, but yea, ive noticed a massive difference in how fast you guys were rolling these out, compared to now

can we shed some light on this, if possible? just curious. Thanks!