It depends on how much warranty is left. If a large chunk is left, you should be ok, but just mentally budget in some patience since as you stated, these cars do much better if you actually drive them. That and things like leather care, paint care, etc will not have been kept up as if it had been personally owned (leather esp, but Lotus is quite good about covering it.)
I bought mine after it had been at the dealer for about 1.5 years (this wasn't really strategic on my part, just happened to be how it worked out and it was a color I wanted-my Evora purchase was sorta "accidental"
).) My warranty was punched a few days before I bought it, so I essentially had a full warranty, and have used it. Lotus has been very very good covering things for me, so I have no complaints. You can ask the dealer to fix things before you buy, but likely they will say buy it then bring it in for warranty work.
This will likely give you extra wiggle room on price. For me, the only issue that still remains is the poor care of the paint while it was on the dealer lot (it is a bit microswirled by my standards) but I will have that polished out at some point and it isn't really bad. Everything else has been fixed.
OH-and that car does have the premium pack.
