Strange choices

[neatoman]

Remember how the writers established that retromutagen was hard to make in order to prevent every mutant from getting cured? Remember how later on the Kraang caused all of New York to mutate into Utrom-like monster slaves? The way they resolved this was by having Mike randomly dick around with chemicals and coming by a solution for instant retromutagen, one he couldn't recreate because it was carelessly slapped together.

While it technically does the job in both solving the problem while also keeping the desired status quo, it does seem kind of lazy to handwave away this development with "the idiot did it by accident", doesn't it?

Anyway, noticed any other strange choices when it came to writing?