This is nonsensical.
The team that dropped Gonzalez gets to reap the reward of having a usable tight end during his bye week. He received compensation if you will.
It is not fair to allow him to add him back thereby circumventing bye week strategy, via a commissioner move.
If so, shouldn't other teams that have to drop even marginal players for bye week replacements be able to add them back once the bye is over?
To alleviate this problem, the commissioner could have added a larger bench.
Show him this thread and put him on notice that he is managing the league poorly.