Riot: We won't keep dominion in custom games because then we'd have to make capture animations
... and that would take too much of our time for each new character. Here's Taric's rework and Ascension. Btw he's got a capture animation.
http://i.imgur.com/El2Di5u.gif
http://i.imgur.com/Ufbr5ej.gif ... anymore.
Edit: Aurelion has a "Channel Spell" animation as well. But really everyone does. Its part of that "quality bar".
#Edit2: here is the ACTUAL quote:
Unfortunately, keeping Dominion available in Custom games still has the same cost as being a matchmade queue. :/ We have to ensure all champions work with capture points, items, etc.
The art on the map is also far behind what we'd consider the 'quality bar' for League nowadays. It would be a herculean SRU level effort to bring it up to parity (when we could better spend that time/resources doing something awesome on SR instead).
And as others point out below, they seem to be prefectly fine (so far) with "ensur[ing] all champions work with capture points" in Skarners Spires passive as well as Ascension. Ascension is one of the rotating gamemodes now, meaning it will be brought around multiple times a year and require some degree of maintenance.
At least Skarner has more than "0.5%" play-rate I guess.
At least the temporary gamemode based on Dominion looks amazing despite "be[ing] a herculean SRU level effort to bring it up to parity"
I'm not hating on Riot or L4T3NCY or Ascension, but I couldn't just ignore how badly some of the reasons stink.
's crystals on the rift!