Missing things - if you need them, otherwise it's not a problem.
Skills - what's actually wrong with them?
Geoengine - sure, that nasty 'chasing' issue is present, but not a BIG issue. Look at sahar server, he did not fix it yet people didn't report it. Even worse, the same crap happens on l2rpg or whatever the server it was (could twist the name), yet people play it and don't complain.
People rarely use brain, so such situation is like a gold fish. You know it does exists, but you never seen her.