I don't understand the problem here. Is WotC forcing everyone involved to cease all home roleplaying in favor of their playtest? Are they making everyone wait around sitting on their rears in between new material? 4 Weeks is really the attention span people have today? Honestly?
For various reasons, we get to play one session every two to three weeks. If we alternated with another standing game, we'd have 4-6 weeks between actual campaign episodes. After the four(?) 5e sessions we've had, we all feel like we've got enough information to appropriately critique the system (generally, we all feel it rocks). We're ready for the next step.
I'd be okay with setting aside the playtest for a bit, but I don't want to be caught flat-footed by (grant advantage to?) the next round of play testing. Last time, we'd only gotten one session in before the survey. I could see getting one session of a Shadowrun (likely alternate) game in and having to decide whether to carry the story and miss the survey or skipping out of a campaign and participating in the play test. I'd rather not make that choice.
I'm not sure how much time I expected between play test "patches", but I definitely am a bit bewildered by having one survey two weeks after release and then
nothing for another month or more. I figured there'd be a second round of feedback, by now.
I don't mind WotC taking some care with the materials. I rather appreciate it. I'd just like to have a hint about how to plan.
Odds are that I'll be adding some meat onto the bare bones of the play test. We decided that we were going to dispense with any pretense of a story and just get right to testing the rules, so we didn't waste precious time. The local town doesn't even have a name (nor does anyone in it). I think I'm going to fix that and have the PCs get a side trek of some sort. That'll give me a chance to see how smoothly adventure creation goes with the new system.
That'll keep us from any false starts with another system, when our real interest is in D&D Next. But, there's only so much I can do without the next layer of information.