I rolled a Grav/En too the other day... 
Domination is the best thing ever, what I do is this:
1. Go round even or +1 con mobs, utterly destroying them and so building up domination.
2. Fire domination (pSCHEeEEWEEWE!)
3. Go round +3 and sometimes +4 mobs, getting loads of XP and totally destroying them.
4. Repeat until level 40 
Hold them and hurt them, that's what I say................ though if you dont hold them, you kinda end up hurt yourself, but hey
"Well, they found my diary today.
They were appropriately appalled
at the discovery of the eight victims
They're now putting it all together.
Women wrapped in silk
with one leg missing
Eight legs, one body, silk,
spider, brilliant!"
Grav/En is really made by the new ragdoll physics. My screenshots folder has never been fuller, poor broken victims 
Opinion time for us Grav/Ens. >_>
What powers do you have so far, and how do they compare?
I haven't played enough yet to really form a solid opinion, but I'm definately thinking of skipping lift entirely. I have crush, power bolt, and bone smasher. Bone smasher is good because it's my heaviest damage power, even if to use it I have to take a hit. Crush is really good, when it used to be useless, and a great hold to get them out of melee range, and power bolt... is power bolt.
Did Lift change a lot? Or is it the same old, same old? Poor damage, and a knockup? If it hasn't changed I don't think I'll get it. I remember having it on my gravity controller and scraptroller, but only because it was about the best damage I had, and a little control in it, but even then it took a lot of stamina.
So, I'm looking for feedback on not getting lift at all, as well as basically all the other powers and how they compare to their CoH counterparts. ^^;
Well, got CoV today. And immediately went to a dominator based on my experience in CoH. I've always wanted to build a grav scraptroller in CoH, mostly because ranged attacks are impossible for a controller. I even got halfway and thought I might be trying again when containment got out.
But heck, with a grav/energy dominator, why bother? So far based on my scraptroller experience this character plays so smoothly, it's unbelievable. Of course, you do get in pinches with heavy hitting mobs. Crush does a good job of getting those out of melee range, if they do get into melee range that power fist attack (I forget the name) is quite handy to finish them off quickly and reminds me of my old scraptroller's Aerial Superiority.
A few things I've noticed is that damage is important to a dominator. You need to keep rolling and reeling in that damage: why? Because you want that domination power kicking in. Meanwhile the damage you do even without it will make sure you last longer against things like yellows, because dead mobs can't hurt you.
Domination is great, incidentally. It makes you feel so... powerful! Hell, one hitting a mob in melee as a dominator is the best feeling ever as far as I'm concerned.
A few things I've noticed: the pace seems much faster than I was used to in CoH, and since I have only tried CoV now, I don't know how it compares. I know the Rest power didn't use to recharge in only 3 minutes, is that a permanent change now?
And something else I've noticed is that Crush seems to last far longer and recharge far faster than it did for controllers pre-CoV. Again I'm wondering if this is a dominator thing, or if these are gamewide changes that apply to CoH too.
Well, that's my little mini-treatise on my experiences with a dominator versus a controller and versus a scraptroller. I must say I like this archetype a lot, and if I'm only half right I'd say this AT will be soloable far into high levels quite easily, regardless of what the AT information provided on the CoV site says.