[Taera]

I do not consider the racial technologies as powerful as some people say.
My most favorite one is the Organic one (no, i do not choose it for its super duper power. i just like the style) and its counterpart, the Crystallurgy tech - their combination of Shard Cannon and the Ray Gun (forgot the name) is pretty nice, especially when coupled with shield depleters and such.

Talking about their uses, and the preferability of other advancements, i can say that i see only 2 uses for those technologies - either newbie fun or some expert player using them to futher improve his/her strategies.
In my Last race, the TechnoLogic i Banned every single advanced trait from my settings.txt , and belive me, the construction, production, combat bonuses are much better than everything a decent racial tech could bring.

Once again the choice goes by the personality and style of the player.

Side note - In My Opinion every person that uses two racial technologies is just lame (no offense) and doesnt know what is "play for fun".
See, combine two technologies like the Organic and the Crystalline, and see your enemies burn in the parasites and crystal shards. where's the fun?