Eh, it’s a 4-LUT. If 4-LUTs were good enough, I’d stick with Microsemi. As it is, their only advantage over 6-LUTs is that they’re much less awkward to be overhead discussing by someone who doesn’t know FPGAs. (“6-LUTs are great” can raise some eyebrows.) The ratio of routing to compute just doesn’t match the problems I have experience with, and the reaction to rebalance this tends to be to omit other features (second outputs, shift register mode, wider muxes) that really, really pay off.