Corrupting T15 to T16 should really be more common

Title says it all, I’ve just recently got to basically needing / wanting T16s to progress and I’m batting like 2/50.

Is this normal?

I get about 1/8, which already feels disappointing as you have to juice them first - and I get more downgraded T14s than T16s.

Kick in the nuts to have a bunch of instilled and well rolled T14 maps that are now only good for pathing to towers...