So, it sounds as if you are in the mostly (if not entirely) Marriott only camp of users. From what it sounds like, you typically have a specific place and time you want to go. We actually find trading super easy and not a problem or hassle at all. We do Marriott maybe 30-40% of the time, the destinations are just too limited for us. So, our method is, gee, let's go somewhere new this year, let's see what we can trade into. Oh, looks like I can get something nice in Uruguay, let's go. To do that via points seems like more of a hassle as you have to buy into II in essence via a too large number of points to do such a trade. So many places we go have no Marriotts. Unless you have another way to do that, the only way is II or renting. We find that going this route opens us up to places we had not really thought about going, but, then appear very attractive once it hits the radar. And we don't do hotels, so, not a choice. So, "let's see where we can go" is obviously much different than your "deposit and wait". Different usages.
I can see though how some or even many might like the simplicity of points. The salesman usually try and sell that aspect during presentations, and it's true. It's always interesting to hear other peoples views on this sort of thing. It seems like one guys hassle is another guys gold mine, etc! But it's enjoyable to read about the different perspectives and appreciate them.
Even when we've had a specific place we want to go, like our upcoming Canary Island trip, we still generally have good luck with our trades. Really, in 20 years, we've never been unable to go anywhere we wanted to. But, at times, it does take some persistence so that could be considered hassle, so, I get it. But points can be too. When we tried to get into Malaga, we had to go on a waiting list for our points usage, which sounds a lot like your II waiting.
So, we are hoping one day we can get the post 2010 enrolled one day so we can trade more. We find trades actually fun! Last year, we stayed at The Colonies at Williamsburg, and, The Estates of Kings Creek. Both were good, neither a Marriott (but there is one there), however, we discovered we really like the Estates and what it offers on site, and will gladly go back any time we can. I like timeshares that are essentially houses, you get your own. So, it was a good find we'd have never found otherwise without II. I would go ballistic if II went away with no replacement in other words! It's an absolute requirement for us.
I guess I am learning that points are not viewed as a negative system by all as activity on other websites forums seemed to indicate when conducting conversations there.