The suggestions are in no particular order, however the most important changes are numbers 4, 7, 8, 9, 10, 11, 12, 14 and 20. I will put the word "ALL" at the end of a suggestion / bug to show it applies to all platforms and "PC" for just PC
Suggestions:
1. Show the team's scores at the end of the match. At the moment it just says which team won and which team lost, but it doesn't actually show the score (eg one team in TDM would be 75 and the other xx) [ALL]
2. Adjust the position of the game ending scoreboard (move into the bottom right hand corner) so that the text chat does not overlap onto the scoreboard [PC]
3. Allow text chat after the final killcam (scoreboard screen) [PC]
4. Remove collision on team mates. There is nothing more annoying than trying to run away from an enemies bullets only to die because your team mate was in the way and blocked you from getting behind a wall/door. That's just one of example of why it's a problem, there's plenty more...[ALL]
5. Add support for the percentage icon (%) in text chat. [PC]
6. Show ping numbers or at the very least ping bars. PC players are not idiots so you don't have to compensate for the lowest denominator The ping bar code is still in the config file [PC but also maybe ALL]
7. Adjust guard dogs. They're the most annoying addition to the CoD franchise imo but obviously it would be weird to cut them out now. Either reduce their range, reduce their health, make them easier to hear or make their kill time 1 second or 1.5 seconds rather than instant kill [ALL]
8. Adjust IEDs by either slightly reducing their kill range or slightly increasing their detonation time [ALL]
9. Framerate optimization for PC hardware. The graphics are not a whole lot better than previous games but the requirements are insane. Specifically, the framerate seems to drop when using sniper scopes regardless of hardware or graphics setting (eg framerate still drops on powerful hardware even while on lowest graphics) Framerate also seems to drop when you have a long view (eg Stonehaven) [PC]
I have an i7 4770k, AMD Radeon R9 290 and 8GB of RAM @2133mhz and the framerate still drops on lowest graphics
10. When swapping weapons, show weapon attachments in HUD for a about a second if the weapon has 2 or more attachments (as in BO2) [ALL]
Example video: For Infinity Ward - YouTube
11. Adjust the mouse sensitivity option ASAP. The current one does not have enough increments (eg increasing sensitivity makes mouse too fast, decreasing makes too slow). Please use a numerical value like from Black Ops 2 because it's perfect [PC]
Picture: http://imageshack.us/a/img716/6536/y26p.png
12. Allow the option to disable music or add a music slider option in the audio settings. This has already been done on the WIi U version [ALL excluding Wii U]
13. Add sound setup in audio options (eg stereo, headphones, 5.1) This may not be needed as I think you have a system in place that auto detects? [ALL?]
14. Allow the option to cap the framerate (as in Black Ops 2) so that your computer isn't being stressed unnecessarily. Framerate options 30, 45, 60, 75, 90, 120 [PC]
15. Add option to reset all settings to default. This was something that really bothered me in MW3 as well because I once accidentally changed the brightness level and was never able to get it back to default [ALL]
16. Add option for individual lean keys [PC]
17. Add in-game team autobalance. I don't actually understand why this isn't in the game already [ALL]
18. Add an in-game option for field of view [PC]
19. Add in-game option for the maximum ping from matches you can join (As in BO2) [PC]
20. Improve your anticheat [ALL]
21. Fix hitching that happens when you first join a match [PC]
22. Didn't mention this because you already know, but adjust the spawn system [ALL]
Bugs:
Occasionally can't pick up weapons despite standing directly on them [Only tested on PC]
Character model in create a soldier moves in slow motion [PC]
Game is in colour during the opening countdown when it shouldn't be [to my knowledge ALL]