Macs have always been 600+ more expensive then PCs and yes, I do believe they were worth it (keyword is
were). For one thing, you'd recoup a larger percentage of the purchase price on selling it years down the road. You also got many many years out of the laptop - I have a 2012 MBP still going strong. Its my kids now and it holds up well. That's a 7 year old computer at this stage. Apple's customer support is industry leading, so you're getting that premium experience as well.
I do believe some things have changed and we're not getting the same value for our money and apple has been raising the price beyond what is considered apple expensive (so to speak)
The cooling is amazing, it seems that its done mostly through OS undervolting That's not a knock, just mentioning how they're doing it. If you run windows on the mac, it will not have the same level of performance/coolness.
As for the keyboard, I really hope this iteration puts the keyboard issues to bed for MBP owners.