I didn't complain and don't care much for nostalgia, but I think the nerfs might actually be good for this game in hindsight. LHC pretty much became a ground for leechers and hackers, and well, don't get me started on the trouble behind level 95 monsters giving better EXP than monsters that are 50 levels higher than them. The loss of places to train my loads of mules that I've been slacking on sucks though, not gonna lie.
A couple of people did, and people felt it brought them to an imbalance between players. It also promoted linear progression, and no exploration.
Nexon has many more maps available than just Von Leon's Castle! Explore around, that's why the areas that many people had forgotten about have been buffed up!