Definitely. Their discussion of Kassadin showed they're pretty sure that 5.4 Kassadin is a pointless thing, but they don't know what to do to fix it. On Veigar, they talked about the big numbers, but they also clearly knew that without reliable E that kit doesn't work. No word on why W was not buffed to fall faster or something.
Anyway, I got the feeling these changes are half baked in their eyes.
Maybe these changes are out of their hands? Maybe the recent changes and mobility creep are due to pressures coming from higher ups to make the game better for .. oh I dont know.. LCS?
Possibly patch scheduling is out of their hands. Maybe they needed to get DJ Sona out the door, for example.
I wouldn't read into this more than it is. This is a patch that contains changes they don't feel comfortable with. 5.3 patch rundown shows no such symptoms. I think they like mobility creep and are looking to find ways to make mobility fairly costed, not decrease mobility.
Kassadin was a priority nerf for LCS, but I don't think this patch was really pushed for competitive play. We didn't see anything happen to Lissandra and Gnar beyond a bug fix, and those are probably the most pressing concern for competitive balance. I'm pretty sure Kass R nerf is a design pushed idea; the competitive community would totally accept a reduction in his shield, increases in mana cost, decreased slow duration, that sort of thing, and it'd work to make him no longer spammed.