The Curse Client does have all the WowAce addons but you need to configure it correctly to take advantage of the most up to date versions. I’ve made a quick guide to help people download and set up the Curse Client to use the newest addons.
So from the top here we go:
1) Download the client here:
Curse
2) After you've installed the client if it didn’t already find your current addons you may need to tell the client where your World of Warcraft directory is. You can do this by pressing Alt-W and browsing and selecting the World of Warcraft directory.
3) When you first install the Curse Client it's configured to download the release version of the addon. If you want the Alpha or Beta version, the ones you were using on Wowace, then you need to change the configuration by doing the following:
a. Click on the configuration tab
b. Click on Addon Settings
c. Click on Global Release Settings
d. Set to Alpha
You’re now set to get the latest version of your addons. At this point I usually exit and restart the Curse Client to make sure the settings have taken effect.
If you have any questions just post here and I’ll do my best to help out.