I've only used rye in a pale ale to try and mimic the restless years rye pale ale by Temperance brewing. I think I used around 10% rye and it came through pretty well.
You could do that too. From my understanding fruit during primary can lead to some off flavor because of how vigorous fermentation foes from the start, and will probably lead to less pineapple flavor. Not positive on this but it depends what your trying to do. Everything I've read on fruit...
Yes. That would be should be fine. Not sure of taste difference bc I boiled it the first time I brewed with it and it came out great so I never changed that beer... Let me know how it goes 😀
I make a pineapple wheat ale every summer. Comes out awesome. I use a juicer, boil the juice for about 10 min, and add to secondary. Three juiced pineapples made about 16 oz of juice. (5 gallon batch). Make sure the pineapple is ripe before using it though or it will come out kind of green...