The ratio quoted by Ecotech coral lab that they were trying to mimic with the SPS AB+ program was a 80% blue plus bulbs to 20% aquablue special ratio (essentially a 3:1 ratio, 3 blue plus bulbs to every 1 aquablue special bulb). With a 6 bulb T5 unit, you wouldn't be able to mimic that ratio quite as easily as you could with a 4 bulb or 8 bulb fixture. However, I hardly think it matters. One full spectrum daylight bulb out of 6 bulbs is likely adequate in a reef tank, and it is perfectly fine to use 2 or more full spectrum bulbs if desired.
Perfectly fine combination and most likely very similar spectrally to the AB+ spectral program. I wouldn't see any reason to change it if you like the combination. In fact, I prefer this mix versus actually including an aquablue special bulb....I've never cared for that bulb!
