It's gotten more stable in most areas (and if you haven't played since beta - it's gotten A LOT bof additions and features added -- with some REALLY nice ones going Live tomorrow with the Seasin 3 update - disable Astrometrics and sector space looks like space - not a colored paintbox )
Graphics wise ground is still more taxing than space so that hasn't changed; and I reccomend making sure you have the latest video drivers for your card installed as well.
As far as the Easiness factor - on your mission Journal (and also from the game options screen) - you have 3 difficulty settings to choose from:
- Normal (The base level of difficulty that STO had during Beta and at Launch)
- Advanced (Tougher - and you're ship/boff and your character hve a chance to sustain Sytem damage/Injury whenever they are defeated. You can be repaired/healed by new NPCs at Starbases; and other NPCs sell regen kits and component kits that you can keep with you to repair said damage/injury during missions; and your Boffs can be injured to by defeats so you need to watch them too.) Chance for better loot drops too.
- Elite (similar to Advanced only it's harder still and in my experience - as I now only play on Elite - when you are blown up/defeated on the ground you're 99% certain to sustain Ship Damage or receive an injury.) Chance for better loot drops (slightly better than Advanced)