I can't help but wonder if the comfort and the leaking go hand in hand.
i.e. comfort is due to very flexible sole/upper. Lots of flex = repeated creasing/folding/flexing of membrane = premature failure. Any soft/comfy boot I've owned with a waterproof membrane has failed early too. Also the only Salomons I ever owned started coming away at the sole as well.
I think the problem is people buying super light 'performance' footwear then trudging up and down Munros every weekend expecting them to perform like heavy, stiff leather boots. There has to be some compromise. Perhaps the compromise is not trying to waterproof the boots, which allows people to buy their own membrane in the form of £30 Sealskinz socks which last OK if you wear a liner sock underneath (thin icebreaker or something).
I decided against repeatedly exchanging and returning leaky boots (the retailer at the time had provisionally agreed to take my Scarpas back) because it just seems so wasteful, your returned boot is likely going to end up on the trashpile and you become complicit in our 'throw away' society. Better just buy something that you know will last (or can be repaired! mend and make do etc.).
Thankfully that wonderful sense of moral superiority lightens your step ever so slightly as you lug your 1kg per foot leather Altbergs up and down the hills...