I'm not great at sideboards myself, and while I enjoy control decks, I'm not great at building them, but I'll try and help out.
Any problem with going a second color? I'm not sure blue has all the answers you'd need. You could add red, to the side board only, by changing your mana base to include 4
Aether Hub (the
Glimmer of Genius will power it back up), and 4
Wandering Fumarole. It stinks that it will give you 4 tap lands, but if you can cast a spell with awaken targetting one of the Fumaroles, when you pay it's activation cost it becomes a bigger beater because awaken makes it a 0/0 with counters, while the activation makes it a 1/4 or 4/1. Red also gives you some burn to remove or go for the head, rather than just bounce in the sideboard.
Staying Mono-U, you could add a couple of
Filigree Familiar for the life gain\block\draw a card, and as good targets for
Elder Deep Fiend. That's going to give you a problem with flyers if you don't have a counter\bounce pretty quick, so perhaps
Pilgrim's Eye may be a better target, and it will thin your deck for you card draw. Though you could also use the artifact creature from KLD,
Dukhara Peafowl, so you can throw it in the air when you need to.
Playing such a controlling deck, you are going to need some more card draw, which is why I looked at red with
Tormenting Voice or
Cathartic Reunion, though black has
Painful Truths,
Live Fast, and
Succumb To Temptation. You could also look at adding some more filtering with
Geist of the Archives,
Smuggler's Copter or the U looter from EMN (
forget it's name). I know that will reduce your chances at getting a counter\bounce spell, but with the deck as it currently stands, it looks like the fast RW decks may be able to be fast enough to push through your bounce\counters, and in the control mirror, you won't have enough draw\filter to ensure you can win the counter war.
As I said, I'm not great at sideboards\control, so I could be completely off base, just my thoughts looking at the deck.