GemRB isn't just a reimplementation of IE. While a lot of the changes and enhancements are in the core or targetted specifically at modders, there are also a few that directly benefit the players. Besides the obvious bugfixes, those include:
possibility to never even load the intro videos
-
(multi)touch input support
if cheatdebug keys are turned on:
ctrl-y will also force unlock doors and containers
ctrl-shift-y will kill all the enemies in the area
ctrl-w will gather all the ground piles you've seen in the area under the cursor, merging items where possible
inventory and containers show blue borders around magic items (like in iwd2)
in bg chargen, the default portrait is randomised (for our sanity's sake :))
some bg2 gui tweaks/addons that allow infinite kits/spells/etc, extra scrollbars
the commands (any of the GUIScript commands) you can issue at the “Cheat”Console are numerous. For example:
SetPlayerStat([1-6],
IE_XP,<value>) will set character's (party slot 1-6) XP.
innates can be bound to quick spell slots
spell lists can be sorted by various attributes like offensiveness or spell school
effects of difficulty on xp and damage are configurable through difflvls.2da
list more