Pros: Good modern facilities, excellent Diamond treatment (large buffet breakfast including special Diamond Menu + lounge + drink vouchers + possible room upgrade), comfortable rooms, fairly wide F&B selection.
Cons: Busy, noisy, and crowded (though not more than the Hilton JBR). You mentioned a concern about getting a space at the pool, which could be an issue. Also if you plan to spend time out and about, it's inconvenient to get to and from this hotel. It has the annoying feature, common in Dubai, of disjointed road access. When you exit the hotel by car, you're just past the slip road to the main highway off the Palm, so you have to make a series of loops on small roads that can be subject to traffic. This is a minor nuisance. Besides the beach, there isn't much of a place to walk to (there is the Galleria mini-mall across the highway, which doesn't offer much). In general taxis and Ubers are easy and moderately priced, though you'd be facing a fairly long drive getting on and off of the Palm.
You can exit the hotel and walk along the beach to (poor and overpriced) restaurants and other hotels. It's very different from JBR (main Hilton, Walk, or DoubleTree) which is a lively environment with tons of (poor and generic) restaurants, tourist activities (e.g., rides, water sports, animations, tour kiosks, movie theater), shops, snacks, etc. I would suggest that you study The Beach (
https://www.thebeach.ae/en) to see if this appeals to you.
Given that you have a long stay in Dubai, with plenty of time to explore, and what you've said about your preferences, I would probably stick with the Palm if I were you, though I particularly dislike JBR but that's apparently a minority opinion.