I believe it can be further elaborated that glass still takes a significant amount of props to make an effective glass proof base, even in the smallest building. I remember I had a glass proof base that was like 50+ props with the glass included. By re adding this, you are opening up further ingenuity and creativity in base building, as well as a new meta to the whole RPG usage game. I don't believe its wrong to say we should re-add it, as even if it was implemented partially to what it used to be, it would help new players tackle RPG spammers who don't even damage their party mates while they key crack into your base.
However I don't believe nerfing RPG's is a solution, as readding the glass effect already nerfs them enough.