We faced a similar decision and went with WL through David's. I called WL day of booking directly (since POFQ and Poly pool renos were fresh issues then) and they told me there were definitely absolutely no known plans for any refurbs during our stay. Of course, now, we have face a couple of bumps - WL pool/geyser area closed, and an additional family member wants to come. David's has been friendly but entirely unwavering. No refunds. No attempts to change suite type or resort. No, no, no. SO... it's a good deal, but we'll never do it again through a points broker.
For 5 people we'd do POR preferred room OR AoA family suite OR Cabins at FW. Also, transportation from WL to anywhere but MK can apparently be a bit of a hassle (sometimes shared buses with multiple other resorts), but from AoA was amazing (no sharing ever) and apparently from POR still not too bad (only POR +/- POFQ).
Not to be a downer, I just happened to run into some bad luck.