Good set of motifs leading to a forced mate. There is an unfortunately inconsistency in the duration of the solution and the content. The nice main line corresponds to an 8 move checkmate while the "ordinary" variation leads to checkmate in 9 moves. Since it is blacks choice he will have to go with the latter one. In a composition the short mate variation is then of little value. Would be great if you could fix that!
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Nice problems! I have an alternative for #2 which is a bit spicier:
I was surprised as well that it worked flawlessly. It's probably not new though. So much work has been done on pawn endings!
I recently made another pawn ending myself. Because there are many pawns on the board, the likelyhood that it is an original increases but I would not place a bet on that assumption!
https://www.chess.com/forum/view/endgames/pawn-ending-12#comment-45301044
Just when you think your bishop has covered your weakness, ..... 
1. Sacrifice for a shield
White to move, mate in 9. NOTE: the option i chose for black leads to 8 moves checkmate but it will be harder and more exciting than the ordinary variation with 9 moves checkmate.