I have days when I get my wetsuit on right abd it feels good and days when it al goes wrong. I had to breast stroke the swim at Bala and I think it was fit. I swim at one outdoor lake and have good and bad days. Try putting your wetsuit on and see how you can move. Try a practice swim and note where the wetsuit fits on good and bad days.
You may need a new suit. Do you have any tri shops nearby you can try ones on at?
Is there anyway of getting a second set of ant+ data displayed on the screen at the same time? I've looked into traineroad companion, but you need 2 accounts and so on. If its only every now and then, or not even in trainer road, but for general training, or long turbo session whilst watching other things, is there an easy program to display ant+ data?