I'm hoping that since it's just the "basic" rules, that'll leave plenty of leeway for them to keep releasing playtest materials exploring the "standard" and "advanced" modules.I'm not too terribly impressed with the whole "most up-to-date D&D Next rules" thing. Either this means up-to-date-now-but-out-of-date-by-the-time-it-gets-in-your-hands, or that there will be a moratorium on new playtest material from when they start printing (soonish I'd imagine) until GenCon. Closing in on the supposed one-year-out mark, it seems like we need more packets pushed, not less, but that's just my opinion.
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I share the same worries you do.