I think in general solid TAG preflop (19/15 or something) is probably better at the 50NL stakes, also considering your stage in the poker lifecycle.

Of course the lessons learned from playing monkey LAG can be very valuable. But seeing players like CTS running 50/30 or something over thousands of hands on high stakes very likely isn't the most profitable way to play 50NL. I believe once you get better, move up, get more confidence, can assign ranges better, know your equity and FE and how to deal with it, etc. etc. your game will start opening up automatically, just because you can play more hands profitable. I don't think you should opening up, just for opening up. If you don't know how to play them, just open up a few more tables and you'll play the same number of hands as a LAG.

But yes, I think the lessons can be very valuable, but I'm not sure if they are at 2NL.