Can the oil level affect shifting if its a little over filled? Mine is like a 1/2" over the full mark when hot and I haven't had a chance to extract any yet. But the shifting seems OK except when I've been riding for a while. I normally shift around 5100 rpm but after riding a while and the temps are hot I have to shift into 2nd around 5600 rpm so I don't have delayed shifting. All others gears and downshifts are OK. Every once in a while 3rd will be delayed. Kind of aggravating because this was my fear of an electric shift. I really wanted a manual but decided on electric. Am I doing something wrong or is it my oil level? Just changed oil to Mobil 4T semi synthetic.
Sounds like your habits of manual shifting could be partly to blame.
As the manual states, do not roll-off the throttle when shifting, despite those stating otherwise. I used to roll-off out of habit, but learned quickly the shifts are much improved when holding it steady. So... the engineers and their manual is correct.
The same holds true for accelerating; although there will always be one or two who will debate that also. Simply be sure to hold the throttle steady when hitting the paddle-shifter. See if you do not see improvement with a little practice. It will take some getting used to and to change some old-engrained habits.
If you do not, then you should have the dealer look at it to make sure you do not have another issue; like cracked vacuum hoses, or a shifting sensor going out (although I doubt either at this point).
In reviews of the SE system by expert riders, a majority of them preferred the performance of the SE over the manual once they were able to master it. I feel exactly the same, once you learn how to maximize it. However, some still like the idea of doing their own shifting, and I understand that 100%.
Having said that, if you have experience on a tight racing bike (dirt or street), personally I do not believe you will ever get that performance from the manual or SE Spyders. At least I haven't.