The massive demand for resources is going to be this project's downfall. You can't have your bar set so high that there is no possibility that you will ever reach your goal.
Heart of Storms, for example, will never be completed.
Project Revolution was never completed.
These sort of projects don't work unless there is a clear endpoint in sight. If there's a conversion with a campaign attached to it, there is almost a 0% chance of it ever being completed.
In my opinion, you should make the races, get them out of the way, release the multiplayer version, and call it a day.
The small fraction of people who actually play through the campaign will not make up for the insane amount of time that it took to piece together pieces of dialogue, cinematic cutscenes, insane triggering and massive environments to explore and complete objectives in.
The Arrakoa don't have a real look. I can't imagine what their buildings would look like, and beaked workers seems like a ridiculous idea to me--not insulting the models themselves, but they seem more like creeps than an actual race.
Having ogres without a massive amount of health seems unrealistic to me for some reason, and having a pure ogre race seems just bizarre to me. They will dwarf all of their opponents... I can't imagine having an army of naked dual-headed soldiers doing my bidding. It'd be insane.
The Orcs' buildings I love. The Maghar orcs are cool. No complaint there. Would like to see what their units look like, but other than that they seem completely doable (not sexually) and fun-to-play.
Dranei archer needs work, of course. Their buildings should be fun (with crystals and all). I noticed you went with the WoW theme with them. Interesting, I suppose.
I hope you luck with this project, although I doubt it will be completed and I doubt any foreseeable demo will ever be released to the public.