I get why people people don't like the changes since it is placing limits on what you could previously do during a match. I'm also surprised that SI were brave enough to do this given that there was almost certainly going to be people who didn't like it.
That said, I think it is a positive change that not only makes the game more realistic but also more challenging. It is clear with every iteration in the last few years that SI wants to move away from the 'Spreadsheet Manager' stereotype and become less stats driven. In my mind, this helps to achieve that and discourages people from play