My experience with my weezle is air migrates very slowly through the suit, my TLS is custom cut and pretty tight with the Weezle on. I find I have to work extremly proactively to stay ahead of the suit, especially the last bit of air. My exhaust valve is on my forearm, so I can see it vent, and it's very slow venting.
My dive buddy even went so far as to use a hot nail to make holes in the outer layer of his weezle near the valve to make it easier to vent and I'm considering doing the same.
I've also added a couple of pounds of lead to reduce the effects of the slow migration of the last of the air.
I'm still 50/50 on whether I like my Weezle, I like the fact I stay warm, but it's more work than I would like managing ascents. I'll dive it one more time in the next week or so, and if I still don't like the way the air is migrating with the extra weight, I'll take a hot nail to it.