Jeff,
For every Pro, there will be a Con.....
It's likely many of the Compound shooting wool nay-sayers are merely repeating what they been told by the magazines and talking heads from the outdoor shows. If you pinned most down to an honest answer they'd tell you that's just what they heard or read but really haven't gotten around to trying the stuff out since it cost so much and they already spent more than their wife allowed from the budget anyways... Unfortunately sheep don't have a marketing campaign nor an advertising agency like the big synthetic clothiers. Sheep just eat and crap and grow the best material to hunt in, wool.
You've heard the saying that the best part of life is the journey, not the destination, well...
Part of the journey is trying out all the stuff out there before you decide on what's right for you. Spend big $$ for the synthics, make sure the back-pack camo pattern matches the designer camo synthetic cloth of the hour. Get yourself wet in 34 degree temps and let us know how it all worked out for ya. As you shiver to keep warm, take solice in knowing that the fashion police can't touch you and you are looking fine in the duds.
Everybody needs to make a buck today and it seems like the clothing suppliers are no different. Each clothing manufacturer needs a "Pro Staff" of yahoos to hawk their rags. There is sooo much stinkin crap on the racks today...don't believe me? Spend a few hours in a Cabelas, Bass Pro, or Sportsman's wearhouse. It's all made overseas, it's all the current latest and greatest and next year there will be another current latest and greatest line of crap that we all just have to have in order to hunt proper.
Next trip out, do yourself a favor and stop off at the Salvation Army and Goodwilly. Spend the equivalent of one pricy pair of super delux synthetic hunting gloves on some old wool garments. Feel the relaxed textures inherent in wool, listen to how the wool responds when intentionally scraped up against a tree or some brush. Smell the stuff. Did you hear that??? Neither did I....when it starts raining don't freak out, you'll still be warm, wet but warm anyway. Shake the jacket out and be surprised at how quickly it's dry.
Is wool bulky, well, yes it is. It's so bulky that it occupies a place of honor in my pack. I just love stickin animals while wearing mismatched wool, shooting my longbow, getting close to my critters, while the Compound guys are discussing the finer points of that 76 yard shot they could have made if only they'd have paid down a few more dollars for the super delux Titanium plated neon sight pin with the extra long extension cord that plugs into the 220 volt outlet....
And besides, Old Guys Rule.....