Other than using your BC for buoyancy rather than the suit, the best advice I can give is to close your exhaust valve once you get out of the water and inflate the suit. It's much easier to walk around in without the squeeze.
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I've found that when I put enough air in the suit to take off the squeeze and still be warm, I am pretty much neutrally buoyant. If I need to adjust more, I put air in my BCD because I don't like to have lots of air in my dry suit.
As for trim, I had a lot of trouble with trim when I first started diving my dry suit and got floaty feet a lot. I tried to move my weight around, lower my tank, everything, but it was still a struggle to get horizontally trimmed until I got 1lb ankle weights. It basically solved by trim issues, so I wouldn't count them out. If you continue to have issues, you may want to try them.
Ankle weights = another tool to optimize weight distribution
There's nothing wrong with using ankle weights.