With the amount of good options available on the market, I don't see any major upside in considering a design with such a lineage of issues except for holding the threat of competition over other partners heads. Having to lengthen the hull by 10m and add 100t to the overall displacement to fix the issues does not bode well in my mind for Navantia being a worthwhile partner. I have heard horror stories about them working with the Australians on the Hobart class destroyers, I would rather avoid those if possible.
I would rank A26 higher but I am skeptical of a design which foundered so long being built by a nation which hasn't built a submarine in house since the 1990's (Gotland) and hasn't assisted building submarines abroad since the early 2000's (Collins). If Sweden does win in the Netherlands, are they going to have enough production bandwidth to accommodate Canada's potentially 4, 6, 8 or even 12 boat order within a reasonable timeframe? They already have a pair of their own subs being built which the first was just laid down in 2022, the Dutch will be ahead of us taking up major work in Swedish yards/supply chains.
The Germans might have similar issues with space for Canadian submarine orders considering the orders on the books for Norway, Israel and themselves although they actually have maintained expertise in continuous production while having larger/more capable shipyards.
As you said, I think the Asian nations have the advantage in yard space and continuous build programs ongoing albeit the German's are the gold standard in conventional submarine building and export, hard to really count them out.