So speeding up the PoS minting and SHOWING via the CPU usage it's actually doing something would be good IMO..
No! That's totally against the whole point of PoS minting.
Besides, it wouldn't change anything in the long run, because an increase in PoS computing power would eventually lead to a higher PoS difficulty.
It wouldn't affect PoS diff at all when averaged over a few blocks. It's just a waste of electricity if you have your client running 24/7 anyways (but can actually save electricity when you launch your pc for just a few minutes to get your PoS rewards).
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What happens if person does not bother generating PoS blocks for let's say 2 years? Does he or she gets the same PoS reward as persons who
were PoS mining every 30 days in same period of time?
...
I think "coinage" is capped at 3 months. So, 10-month-old coins are just like 3-months-old. Waiting a year or two before starting up the client again will be missing the chance for some of the interest that could be generated.
That's right.