At this point, we just have to be patient. I'm not tired of waiting for Riot. The impatient people making a big deal about waiting is far more draining. This goes for more than just Dominion or Twisted Treeline.
As for rune pages, I think Lyte's data is not wrong. At high elo, you are probably very specialized in one role. If I have one of the top ten AP Mids on my team, I'm going to have him go AP Mid. And that guy will probably have couple of rune pages but only needs one or two for most cases (assuming his opponents don't do anything crazy).
The important thing is that there is a new guy in charge of managing the IP/RP prices for League of Legends. So, I am expecting some changes to go on.
Personally, I think Rune pages should increase for every rune page you own. An example being, the first rune page you buy is 450 IP, then 1350 IP, then 3150 IP, then 4800 IP, etc. Not necessarily in these numbers, but you get what I'm talking about. That way, buying a ton of rune pages is difficult but getting those few to have a reasonable spread of rune pages is a lot easier now.