I do agree with the penalty...
Lets have some options and take a vote on it. Here are some I came up with:
Can keep two first rounders but loose the next available closest round
Can keep two first rounders but loose next season first round and the season after thats first round to make up for the additional first rounder being kept
Can keep two first rounders but you loose the next two available picks as a consequence
Cannot keep two first rounders. Only one is keepable
J! E! T! S! JETS! JETS! JETS!