It's never been determined what causes/caused the blistering. Alfa motorhomes don't have "wavy" delamination--it's blisters, and sometimes the blisters pop and reveal the wood behind the filon or sometimes the styrofoam behind that.
Alfa pointed its finger at Crane Composites, citing bad materials. Crane pointed its finger at Alfa and Alfa owners, citing inadequate sealing. Alfa closed its doors and the fight was over.
There does seem to be a correlation between blister occurrence and being in freezing weather, with the theory that the wood gets wet and expands when it freezes, causing blisters. Glue was never mentioned in the endless discussions about blisters.
There were I think 4,700 Alfa motorhomes sold. Not all have blisters, but it would be prudent to expect to get them at some point unless it's been completely resided. Spot repair and paint won't prevent the recurrence of blisters; you'll have to get it resided if you don't want to look at them ever again, and it's expensive and a PITA. But plenty of owners have done it.
I, personally, don't think the decor is upscale, but if you like it, you like it. But be aware of little things, like on the cabinets on some models (and maybe all?) the doors are wood but the cabinets themselves are covered with wood-grain paper. Alfas were relatively inexpensive for their size and features, and that's an example of the way they cut corners.
I've been fulltiming in one for 14 years. The giant windows and 7'6" ceiling make it very livable. The windows cause issues with cooling in hot sunny weather, but other than in extreme conditions like that, the basement air is nice (and window coverings make a HUGE difference). Some owners have installed a supplemental roof air and that alleviates the problem, but they almost never mention how noisy roof air is. But most other RVs have only roof air in the first place, so they never have the option of using quieter basement air.
There is an enormous amount of storage both inside and outside (I'm not sure about the small basement doors--they fill in the openings.) I've never heard that women designed the interior, but there are a lot of thoughtful touches. And plenty of thoughtless ones, too, though.
If something happened to mine, I would at this point replace it with another one. It has some design things that are important to me and that I can't get in any other coach. It's not built like a Prevost, but it's a whole lot cheaper.
And one other thing, and perhaps the most important thing--there is an email list of Alfa owners that helps with problems. Oh, like the split house/inverter battery system that the nimrods at Alfa put in, which is easily combinable into one bank but people don't realize they can do it. That group of Alfa owners is invaluable for the DIYer, and can be a big help when someone has a coach in the shop; most shops aren't familiar with Alfas and the information in the group can help them cut to the chase.
There are people on that list who know these things inside and out and after this many years, there's almost never a situation where they can't figure out how to fix someone's problem.
There are also some places that specialize in Alfa motorhomes and know them well: one in Salt Lake City, one in the Los Angeles area, and one in Louisiana. You can take your coach there and know you aren't going to pay for hours and hours of time for the techs to familiarize themselves with the systems.