2 wound farseers seems like a pretty logical thing to happen to draw them back in line with most other 6th edition analogues. Librarians and chaos sorcerers are both 2 wounds with variable mastery levels. Obviously farseers will have a mastery level 3 ceiling, not sure what the basement will be though. I assume they'll start at level 2 and have the option of buying 3 for 25 points.
Turning Warlocks into actual psykers would be really great I think, depending on what lores they have access to. Comparing them to the obvious analogue of Thousand Sons sorcerers you'll probably end up with an eldar specific lore consisting of 3 random powers and 1 primaris, with the third power being a warp charge 2 cost and therefore out of reach of warlocks, so you'll basically have a 50/50 chance of something or you can opt for the primaris.
The obvious reason for the change would be to remove the "must have" tag from farseers. Of course, you can't accomplish this satisfactorily unless you also buff Autarchs or any other HQ choices that are available. I'm pretty sure that is something that will happen.
The vehicle rumors are also a no brainer. The base cost of eldar vehicles isn't too far off of what it should be, its just the horrendous price tag and obsolescence of the options. A discount on options and a refresh on the wargear rules and you're back in business.