Ok here we go...
1: the future is limitless. Honestly to a game designer the future is GOLD. They can take a series wherever they want and do as they wish. This opens up SO many gameplay mechanics. However, the past also is quite fun after the future has been warn to the bone. I'd be fine with either.
2: Yes. So many innovations for this have been discussed by many users here. If grey arch (too lazy to fix typo, yet somehow not lazy enough to write this explanation of the typo) has heard our plea to bring back Easter-egg teasers, surely they've heard the ranking system plea as well.
3: This is desirable. But put a limit on it of course, or a waiting period between wipes.
4: activision is in bed with Xbox. Multiple players needed for the Easter egg means higher XBL sales. I know I used to ONLY get XBL to do the moon, shangri-la, and COTD EEs.
5:Mod tools returning are desirable. But TBH the AMAZING map creators who have just been working with WAW will create the tools for COD 2015 mechanics anyways.
6: No. Just bring back private matches alongside custom matches. Custom matches themselves should also have a "Party" mode where you and 4 others are dropped in a map with randomly picked customizations.
7: In solo? Sure. But I doubt they'll do it.
8: I think the Bowie and galvaknuckles are great now. Perhaps being able to PAP them to last an extra 3-4 rounds? That'd be nice.
9: I think a zombie counter should be a perma perk. (In my system, perma-perks can be equipped at a max of 3. However the more OP the perk is, the less metaphorical XP you receive)
10: Turned and Greif could use some tweaks. But hardcore mode is a bit too hardcore. I mean, zombies that move faster alongside 3 hit jug and NO MGs or ray guns? No one would make it to round 20. Perhaps just zombies in greater numbers and more expensive purchases? (3000 for jug, 6000 for PAP, ect.)
11: How a bout instead of making a player wait til round 30 (which I never have the time or patience to do either way unless in co-op) you just add more epic attachments: under barrel ray-gun, flame thrower, mini-thunder-key-launcher.
12: No, a PAPed five seven is still a great weapon and worth more then 6000 points. Furthermore the upgraded box would make players never stuggle: Out of amo? Just get another weapon from the box.
13: I highly disagree with you about most of this, while YES transit's style was tedious and un-rewarding and should never be repeated, buried's style I think was the best: A player has the ability to carry multiple types of parts but only 1 of each type, MOTD and Origin's style is also admirable, but with too many buildables can become a hustle. Furthermore, i think more buildables would be wonderful and I actually REALLY like the zombie shield!