What first drew me to the Myst game was the EXPLORATION and STORY....not running/leaping, or timed (with certainly NOT enough time) puzzles (keep remembering the 'Chair' puzzle in one of the later Myst games-what a nightmare that was-had to have my son do it-and also do the jumping on pressure plates in one of the other games.
Well you can't blame Cyan for the chair. Myst IV was developed by Ubisoft, not Cyan.
Uru was their doing though.
They really need people like you to beta test any dexterity-dependent puzzles though.
Either that or provide a skip or alternate solution for them.
You could try using the "Contact Me" link on the ***Kickstarter page***
to voice your concern.