I'm looking forward to things like real inventory management, database add-on ("I caught this fish over there using that bait"), proc monitor ("PowerAuras"), inventory consolidation (full 100-slot display, tooltip telling me how many I have in my retainers), etc.

Regarding boss mods, many people are already relying on raid leaders telling them what is coming next via voice chat. It won't make a big difference. If anything, it will make content seem easier in general because more people have those warnings. The only way to remove these boss mods is to design boss fights that are not static patterns. Phase changes based on a multiple of dynamic factors (damage intake per second, raid healing output, tank hardiness, speed that adds are going down etc) or even branched phases. The simplistic design of boss encounters is what makes boss mods useful and it is also what supports the existence of boss mods.