Feature Suggestion - tailored puzzling

I really think that puzzles should be delivered to the user more deliberately, specifically on games from the rating that they play the most games from, so for example '15+10, 1450-1550' and find the position in which the game was ultimately decided, so that one can get used to these positions and ultimately become more adept at recognising game changing correct moves. If this could be implemented somehow this would be great, or if there is a workaround from the community then this would also be great too. 

I don't think time controls are something captured for puzzles. That said, the types of puzzles really don't change based on time control.

Yes, however certain mistakes might be more common in shorter time controls than longer ones. But none the less implementing them all into a more niche puzzles program would be very beneficiary.

Yes exactly ojops, it allows the practise to be super precisely targeted at your level.

I think you may slightly misinterpret me, if the derivation of the puzzle is from rapid 1500 then this tend to be of a different difficulty to if the derivation were blitz 1500 due to the cognitive demand difference.