I want to see a 'revamped' XCOM UFO Defense come out, but I'm cautious as to how it will come out. Since from what I heard the people working on the remake are consulting with the original team behind it (could be a rumor, but it's what I heard), and judging by the alpha trailer I saw a month or so ago, it looks like it could be pretty good.
Hell, they could re-release the exact same game and fix the following issues:
Difficulty Bugs: (XCOM's difficulty dropped to Beginner(Easy) after the first mission/save. Terror from the Deep rose to Superhuman (Oh God I'm a masochist difficulty) afterwards.)
Equipment Management: I like to choose what weapons/grenades and such my soldiers use, but not between EVERY. SINGLE. MISSION.
Troop Order: I don't know how the game figures out it's troop placing, but I wold prefer to decide myself who leaves the Skyranger/Triton first. While having my best troops leave first might not be bad at the beginning, the panic wave that will overwhelm my troops because their fearless commander died on turn one because I can't make him start in the back is not good.
Research Bugs: This one applies to Terror from the Deep, but if you research certain things in the wrong order, you might lock yourself out of the final mission. XCOM had this issue, but it could be resolved by re-capturing and re-researching an enemy commander.
Save/Load issues: I am a perfectionist... I will not accept a troop's death because of my stupidity. So I save and load a LOT. I hate having to abandon the mission first, than load the game. Allow me to load/save my game wherever.
Inventory Limit: This isn't so much a problem in XCOM as it is in TftD, but 80 items is not always enough... especially in 2/3 part missions.
I know most of these are fixed using Xcomutil, but the troop order thing I would like to be able to order them how I would like to, not just "red shirts" first. (even then it sometimes puts my high ranks in front.)
I'll also just leave this here, for those who might want to see/play XCOM. (it's only $5 on steam, and it's worth it)
http://www.youtube.com/watch?v=0UKrk10ixiY&list=PLD91BACF0E36EE427&index=1&feature=plpp_video