dont make a launch date, release it at a random day and hour, otherwise whales are gonna be pointing their hundreds Mhs farms when the coin launches 
This.
Seem like a good idea to me. Announce that the coin will be randomly launched between Feb 1st and Feb 7th, and when it is launched the announcement will be made here, in this thread. Also, make the block reward start out small and slowly increase (over the first week?) until it reaches its "natural" level. That should make for a smoother launch, I would think.
I don't know. As soon as the launch is announced farmers will come anyway so you move the problem rather than solve it. To be honest I have no useful suggestions how to tackle this. Maybe exclude solomining from the coin and cap pool registration to 500kh/s per user. It may demotivate big farmers to register 100+ accounts, but then again i seen that documentary about chinese kids statpadding WoW characters so yea, I don't know...