A lot of people in my clan go with Brother in Arms as their first skill when re-specializing the skills.
I find it's pretty appropriate for medium tanks and artillery.
The crew skills are pretty situational to your vehicle, imho. The clutch-turning is really useful for a fast scout, slow heavies, and turretless TDs.
OTOH, I have my churchill as a command tank with: the commander having recon; the radioman having relay, situational awareness, and extended range; and the tank has binoculars.
I do notice that not having as many repair skill and camo skill points does really make a difference. Track hits are more of a problem now.
I'd also think about having the commander's first skill be mentor if you want to rapidly get four skills in each slot.