Delightful to be able to enter into this distinguished forum you have sponsored. Perhaps, I can summarize.
Over a 1♥ or 1♠ opening the preferred method is always for a 2 level reverse to show extras - a king or better. This also works well over 1♦-P-2♣-P , although you may occasionally have to rebid 2NT with 4-4-4-1 shape and a minimum. You keep the bidding lower with the slightly better hand, a hand which is hard to show any other way.
Slams with 15-17 HCP opposite 14-17 HCP plus a little distribution can be hard to bid sometimes because neither partner appreciates the full potential of the combined hands. Overcoming this as best one can is the reason to play 2/1 in the first place.

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