Not.
I'm not dissillusioned at all. Sure, I like to mix it up with a variant rule here and there when I DM just to keep it fresh, but I'm playing in a straight up 3.5e game and having a good time.
Last time I ran the game, I put a couple of UA variants in (spell points, spellcaster levels, etc.), but the only variant I keep steady is the Reserve Point variant from UA.
Basically, I'm having fun playing 3.5e as is, so I'm not even thinking about asking the DM to alter aspects of it.