I'm not going to argue this much further. Essentially Mir is touted as a highly generic and portable library. Having it only work on one language implementation works against that statement, the credibility of Mir, and the credibility of D as an universal platform for creating fast code.
Isn't it just a matter of adding "version(LDC)" around the more optimized blocks?
Having it work in DMD, however slower, is good enough.
