Hi Chris - I played a long while with the Burners and only moved to the R11's after this years US Open at Olympic.
I found the R11's problematic in that the extra spin on them combined with the top level Nikes' spin meant some pretty severe wind effects, but changing the way you use backspin gives you more range on the R11's. ie About mid backspin with R11 and Nikes is equivalent to full backspin on Burners and Legend Callys. Which means you have lot more backspin available should you need it. Makes a difference on holes such as Oak #9, front pin (R11 full backspin, you can actually land the ball on the green and keep it below the hole), BPB #7, right pin (can also go for pin and keep it within 2 yards of the hole), BPB #4 (have had a few putts for Eagle (green and not back fringe) here with R11 3i).
Another big R11 advantage is (as has been mentioned previously above) the 3 iron. The extra 5yards might not sound like a lot - but it goes a long way to bridging the gap between the 3w and the 3i - and with the extra spin range available on the R11 - the choked down 3w becomes pretty rare.
Two downsides to the R11's:
1) Although the specs say R11 have a half a dot more forgiveness, I found the Burners to be much more forgiving in terms of left/right deviation when missing the ding - may just be me, but thats my experience.
2) The 5 yds less on the PW of the R11's limits your 101 to 112 distances. Punched PW R11 is 103 yds vs the punched PW Burner of 108 yds.
But, and an important but, the new Rockets have a slightly slower Meter, and it aligns your meter speed with the R11 driver and R11 3w. That should mean more dings hit and you can never discount that benefit to your game. Seeing as you are already used to 1pm meter speed on the Burners, that should not really affect you when you upgrade to the R11's.
My opinion, hold on for the R11's - that 3i and the extra spin avail are game changers. Plus, you will save 2500cr, cos even if you do decide to go for the Rockets, you KNOW you are gonna have to try the R11's when they become available.