Fair enough, we all have our preferences. I found the PE90's 9lbs to be unbelievably overweight even if not compared to an AR carbine, that's slightly heavier than some M14s in fibreglass, and the M14 is considered a heavy brute and it's a .308. It's the same weight as my .375 H&H Express rifle as well, and yet only a .223. The fragile mags comment comes from their connecting tabs breaking on my mags, and another 5/20 that cracked where the rivet was put in. I'd take steel mags happily in comparison, but neither of us are hauling the guns into combat so the point is moot if both options are durable, and they reasonably are.
I agree with you on liking the clean, non-tacticooled lines (seems you like this as well), no fan myself of hanging rails and accessories off everything. I enjoyed my PE90 for what it's meant for, prone iron sights shooting to extended ranges. However owning it beside M14 builds I prefered the M14 given it was the same weight, yet a .308, and the M14 had the better iron sights. The diopter sights are swell by can't compete with the MOA clicks and range of the M14, but we're getting into battle rifle vs black rifle at that point
Finally, KevinB detailed his experience in the Middle East years ago when he was gung ho on the Swiss rifles, unfortunately however the experienced problems with theirs and the AR quickly replaced it again. I'm paraphrasing as it's been years, but the thread will still be there if the particulars are desired. I do believe it's a good rifle, just not all it's hyped to be on the black rifle forum. You are right in that it could be one of the most accurate non-restricted black rifles available, but mine only really performed with RUAG and was otherwise very similar to my M96 and 580+ series Mini, and behind my ARs at the time (albeit they are restricted). So decently accurate in summary, but didn't stun me there either unless using the RUAG but too pricey, and just so darn heavy for what in the end is a good quality sheet metal stamped .223 rifle with a decent barrel. I'm still shopping them depending where this classification business goes as I enjoy most fighting rifles for target use, and the PE90 is fun there too.
Good thing we don't all agree it would be a boring place!