Nice. The one thing I'd want to watch for is to make sure that the Standard portion is still different from (and of course better than) a basic attack. For example, your Priest's Shield example is completely equivalent to a one-entry power which read: "Minor action, Full Discipline: Grant a +1 AC bonus to [etc]."
In that specific case, for example, I would keep the Standard action the same (or, more likely, bump up the AC bonus to +2), and for the Minor let you mark an adjacent creature for a turn, or perhaps prevent an adjacent creature from gaining CA against an adjacent ally for a turn.
Here's a follow-on thought for you. Make a set of Style feats which add the Full Discipline keyword, and a move/minor action benefit, to the specified powers. Hell, make 'em Monk MC feats while you're at it, and submit it to Dragon...
Pearl Wind Style (Multiclass Monk) Requires Dex 13. You treat this style's associated powers as Full Discipline powers with the base power as its Attack technique, and add the listed additional techniques to the powers' text. You may also use monk implements.
Priest's Shield - Move technique: Shift one square into an ally's space, and shift that ally one square into an unoccupied space.
Sure Strike - Minor technique: Until the start of your next turn, you may use this power's attack technique as an opportunity attack. If you hit with this opportunity attack, you may shift one square.
Careful Attack - Move technique: Shift one square to a space adjacent to an enemy. Until the start of your next turn, you gain a +2 power bonus to AC against that enemy.
Flowing Stillness Style (Multiclass Monk) Requires Wis 13. You treat this style's associated powers as Full Discipline powers with the base power as its Attack technique, and add the listed additional techniques to the powers' text. You may also use monk implements.
Footwork Lure - Minor technique: Choose an adjacent enemy and an adjacent ally. Until the start of your next turn, if that ally provokes an opportunity attack from that enemy for moving without shifting, you become the opportunity attack's target instead.
Bolstering Strike - Minor technique: If you are prone, stand up. If not, then the next time you would be knocked prone before the start of your next turn, you may immediately make a saving throw to remain standing.
Priest's Shield - Move technique: Shift one square. If you take this shift, then at the end of the shift select one adjacent enemy and one adjacent ally. That ally may not grant combat advantage to that enemy until the start of your next turn.
Waterfall Ox Style(Multiclass Monk) Requires Str 13. You treat this style's associated powers as Full Discipline powers with the base power as its Attack technique, and add the listed additional techniques to the powers' text. You may also use monk implements.
Opening Shove - Move technique: Move half your speed. You may move into enemies' spaces during this move; if you do, slide each such enemy one square into an unoccupied space.
Focused Fury - Minor technique: Shift one square into an enemy's square, and push that enemy one square into an unoccupied space. Until the end of your next turn, when using any power which checks if enemies are adjacent to you, you may ignore this creature for that calculation.
Dual Strike - Move technique: Choose one enemy which is not adjacent to you (but is exactly two squares away), and a second enemy which is adjacent to you. Shift one square to a space next to the first enemy, and slide the second enemy to an unoccupied square adjacent to both you and the first enemy.