If you look at the history Turbine has, it is very apparently that their priorities are new products to market within LOTRO. Bug-fixes only come swiftly if it involves the Store or something they just cannot place on the back-burner at all. The game is a half-working engine glossed over time and time again with a shiny paint job to attract customers. Yes, Turbine needs to stop development and focus on upgrading the game. The BASE PC out there absolutely has gone up since 2007, so lifting the game to at least 2010-2011 standards is not a huge burden on the player base.
They seem to be focused on luring in new people for a short time than to retain players for a longer time.
Part of the success of some other major MMO titles (WoW specifically) is ... the game engine has ALWAYS been consistently evolving. Physics, animations, etc.
If Turbine would spend half the time fixing the engine and other problems as they do on the Store and making wallpapers, the game would be running far better.
"I swear to God, if this thing turns into a zombie attack, I am quitting." - Jack Carter