I hear that Freddy plans to use him at 3B, does this mean the Bonifacio experiment is over in Florida?
It should be over. In fact, it never should have begun. But its doubtful as that would mean Beinfest would have to admit to a mistake. Oddly enough, in games other than vs the Nats, the Fish have been caught stealing more times than they've stolen bases. Pitiful.
Uggla, on the other hand is the highest paid Marlin, and has one of the worst performing contracts in MLB. Plus, getting him out would mean Loria could pocket even more revenue sharing, which is always the #1 consideration for the Fish. In only 3 of the last 21 games has Uggla driven in a baserunner. During that span, he left 49 on base and doubled up a 50th. Getting rid of him is about the only way to keep Fredi from batting him 5th.
Also, Hermida could be targeted to escape from Florida. Loria and Samson didn't want him this year, but Beinfest wanted to fail for another year, because, well, to let him go would mean that three of Beinfest's 1st round picks since coming here were so bad that they are already complete bust (Tankersley and Allison, who never even got above A ball the other two), while he traded away Adrian Gonzalez, who had no future.

Once today's move is made, and Sanchez hits the DL, the Fish have only 3 starting pitchers on the roster (though Johnson is also listed as a reliever ). Beinfest will probably just burn options, but a trade may be necessary.