Regarding tucking:http://mtgcommander.net/rules.php rule 11 now states that: "11.If a Commander would be put into a library, hand, graveyard or exile from anywhere, its owner may choose to move it to the command zone instead."
Even with tuck effects it's very difficult to deal with OP commanders due to the number of tutors available.
... But on the other hand this is a format where mana crypt and sol ring are legal and the ban list would have to be longer than Santa's naughty list to make the format balanced anyway. So maybe it doesn't matter that a degenerate format became a bit more degenerate.
As someone who is invested in Commander (in part because the staples are a good investment and having only 1 of each protects you from serial reprints) I feel this hurts the format.