One place that we bought had such a bad survey the auctioneer was convinced we wouldn't buy it. The bank's valuer cleary gave the game away as he mentioned something negative in his report to the bank, so the banker phoned me and asked me if I'd done a survey, there wasn't a chance in hell I was giving them the report. Or that would be the end of the mortgage. I said we didn't do a survey as my brother and my sisters boyfriend had looked at it and we were going to be doing a lot of work and it was grand.This may be obvious, but do not give/mention the report to your solicitor or they will be obliged to inform the bank and that may well be game-over for your mortgage application. Get advice you’re comfortable with from specialists in these issues then make a call yourselves.
FWIW neither of those issues would stop me purchasing, perfect houses do not exist here in my experience.
That same brother bought a house last year and the solicitor got sight of the survey report, so maybe that's a new thing nowadays.
I'd be of the same opinion as you as regards the OP's purchase. I'm amazed he got 15K off considering it's a seller's market.