In the case of this mod, no, before installing it i was averaging 7-9GB Total RAM used, with it installed and the default configs it's going above 16gb often and averages about 15-14 after a while, even more with larger ships.
I'll try with the mentionned DLL, see if it makes a difference but i doubt it, the RAM issue doesn't affect me because i've got 32Gb, however the performance drop is ... Meh.
Still, i love this mod, it sounds just amazing.