I like the way you have the positions, except you migth want to consider a second forced WR spot, whether that means cutting back to 1RB and 2WRs with those flexes or something else (like just adding a second WR to make it 8 starters - prolly what I'd do). I think adding an OP (making QB a flex-able guy) in a 14-team auction would be interesting (much like ESPN's "Man's League"), but with all the flexes and IDPs you're already pretty unique and deep.
As for the depth, it's a 14-teamer with lots of starting requirements, so I think the list you have looks about right for the "value" to expect to be left over after the draft. With shallow-ish benches, there will be enough FA action to keep people interested, etc. without either being flooded or barren