I like Dawson, as I remember the time when he was first choice but we were on a run of conceding every game. What I liked at that time was his attitude. He gave the impression that he knew things weren't going well, happy to accept his faults, and was focussed on improving. He has improved over time.
However, I can't say there are no better keepers out there.
In an ideal world it's good for Wednesday. Either Vazquez comes in and improves the team, or Dawson sees the challenge and goes up to the next step and reclaims his place.
But neither could happen, you roll the die and take the chance.