Overall, it's a good concept. But ... why primitive everything else, and then ERLL & LPPC? Cognitive dissonance.
If they're specifically imported, at great expense, just for the use of regimental commanders, then call it out. But that's at a contrast to the rest of the design.
I realise there's not a good low-tech set of equivalents with 11 tons of mass to play with, but maybe a PPC, a pair of LRM-5s, and drop the heat sinks to 12? That'll keep your commander keeping the range open.