If you have UHS-II cards and a nice USB-C card reader, that alone can make the experience a positive one, dongles or no. Truth is, I really really like USB-C so far (two months in), and will be happy once a few more of my legacy devices are USB-C native (or replaceable by a model that is).
I just wish someone made a multiple port USB-C hub, not just another dumb USB-C-to-USB-A hub. I preordered an Arc Hub, but just as with stock options at a startup, there's a 50/50 chance I'll ever see any value there...
The card reader was killed because people were using them to expand the nose-bleedingly expensive to upgrade soldered on 128k hard drives. Apple's seeking to drive up the selling price without adding quality.
I tried using a really fast and expensive 128GB card as extended storage. They're pretty much unusable, slower than a fast USB3 stick, and less practical than a Samsung T1 SSD or something like that.
I don't mind the lack of an SD slot, but I won't buy another Macbook Pro until there's 32GB of memory. I have a late-2013 Haswell MBP with an OWC-upgraded SSD, and I prefer it over my work computer, a 32GB maxed-out Thinkpad running Linux... in pretty much every aspect.
Why? If you don't care about spending extra for the dongles, after you've bought them there basically are no downsides to having to use them for legacy devices anymore, but all the advantages of USB-C still remain.
I don't understand why people get so worked up on the dongle thing anyway, for me it really is a non-issue, and I have only a single C-to-A cable. I do think Apple should not have been so damn greedy and just put a dongle in the box though, there really is no excuse for leaving it out considering the already crazy high price of the MBP 2016.
Until they get borrowed or even "borrowed". Every other day in my office has a mac user wandering around looking for some sort of video adapter dongle or similar, asking if anyone knows who borrowed theirs. Person A isn't in the office, so person B borrows their adaptor 'just for now' and then absent-mindedly takes it home, leaving person A scratching their head the next day.
The problem with dongles is more than just price-point.
When they're cheap and small enough to leave on all your existing cables, then yeah, they're probably a non issue.
May be even better in the new MBP because you don't have to care what port to plug into since they're all the same- I always end up trying to plug USB into the magsafe on my 2015 MBP since USB is in the same position on the right side.