It'll probably never get suspect tested. Rotom is good, but he's not by any means broken. Nor is it overcentralizing, since you can usually hardass it with a not-so-ideal matchup if you have to since it has mediocre offenses.
Even if it was broken (Which it would be if it actually learned Scald and Ice Beam,
>>22455411, you dumbass), smogon would be reluctant to do anything about it because they have an irrational love for the damn thing.