The keyboard and trackpad on the new Type Cover are actually quite nice. I certainly prefer the buckling spring keyboard on my desk for extended typing, but it easily matches or exceeds the majority of mobile keyboards I've used.
A bluetooth keyboard and mouse is one solution, but not necessarily an idea one. Most options right now (including the Apple keyboard and mouse) haven't been updated to use the new "Bluetooth Smart" low energy mode, so you're going to lower the effective battery life of your tablet or phone by using it. The devices themselves need power as well, which means keeping those devices charged or dealing with removable batteries.
And of course you have additional parts to carry around, unless you're using a keyboard case. For everything but the iPad Pro, that's a third party accessory (which isn't necessarily a problem). And given the lack of native iOS support for pointing devices, that will still be a separate device with third party support.
I actually think the relatively constrained storage is the biggest mistake in the iPad Pro. Cloud storage is fine for some applications, but local storage is still necessary for offline access (like keeping the kiddies occupied with movies on a road trip), application storage (they just upped the limit for an app to 4GB in the Apple Store) and production. That last point is of particular import as the iPad moves away from being a consumption first device. In the era of 4K video, 20+ megapixel cameras, and multichannel high resolution audio, 128GB doesn't go very far (and 32GB is a bad joke.)
I'm frankly surprised they didn't go at least 64GB on the base model and 256GB (if not more) on the top end. I'm less surprised they didn't include an SD card, though the inclusion would have been as useful for loading content as expanding storage (think digital photographers, who can easily fill a high capacity SD card in a single shoot).
But then for editing tasks the storage may not matter. Even if the A9X is surprisingly fast, the relatively meager 4GB will become an issue. (Amazing that's considered meager these days, but that is absolute entry level for notebook from Apple. Microsoft does offer a Surface with only 2GB, but that's on entry level Surface 3, which is $499 (or $599 with LTE).
Assuming that ISVs actually supports Apple's bid to expand the scope of iOS as a platform, I fully expect future iterations bump both the base and top end specs, but I have to wonder if Apple made a mistake not aiming higher in the first place. If people buying it are just buying it as a "big iPad", they will fail to fundamentally change the app ecosystem. On the other hand, the number of people who actually WANT just a big iPad may render that moot (and it will keep producers buying the more expensive Mac OS X based products).