I think its unfair about dash, IMO. She has a wealth of different aspects to her that can all be used now:
She's a coach and a leader, and that's something that is incredible to see: Seeing more episodes like Hurricane fluttershy where she has to lead and encourage the Pegasi under her to achieve goals would be great.
Similiarly, she still has her wonderbolt angle, which is wholely distinct from her leadership aspect, and is still waiting to be developed.
Additionally, she's got a HUGE adventurer streak now, to the point where I feel that she'd be happier being a free lance hero and adventurer than a wonderbolt, what with her hero worship of Daring do and how she Loves danger and adventures (just look at her in that preview clip, she's like "FUCK YEAH, dangerous adventure, lets go pwn some evil").
Hell, its funny because that's more or less what her "job" in life is now, compared to being a weather pegasi.