This game becomes 25 times better if you use the following mods in this install order:
(all available at gibberlings 3 forums)
1)spell revisions version 4 which supports bg2 ee (not yet available for BG 2 EE openly, but im using a closed beta of it). version 3 runs only on simple bg 2 trilogy.
this mod contains a MUST HAVE fix of a nasty old bug where mirror image blocked aoe spell damage. If you have this bug, this mod is a must install.
Also this mod makes very good spell changes (makes the ineffective spells more effective, and overpowered spells less effective)
2)sword coast stratagems. This is a complete overhaul of the game with extremely good enemy AI and new reasonable abilities, fixes for magic system and items. The opponents will use all the options the player can use now.
3)gibberlings 3 tweakpack for bg2. makes the game much much less frustrating like you know if you played it a lot you can have an option to remove the boring traps and locks etc, rest anywhere, set xp cap at 20, 30 or unlimited levels, enable full grandmastery with a neat +1 attack per round bonus when going from 4 to 5 stars.