Bladez are Burners 2.0 with a slower meter. Yardages are identical. I used Burners since L79 and traded for Bladez because they solve a specific problem for me regarding matched meter speeds. I'm not sure yet what I'll do at 90 re R11's.
However, you sound determined to get R11 irons at 90, with a faster meter then your R11 driver/3w and CG's. I wouldn't spend 2,600 on Bladez now, just to drop the meter speed as an experiment, knowing that i will spend another 3,000 at 90 to increase my meter speed to where it was with Burners.
Suggest renting the Bladez, give them a proper workout, and make your decision.
If you have credits to spare, then good for you, no rental necessary. Enjoy your new Bladez. :-)