Matchmaking takes more time, because it's skill based now - I get that, but I don't really want to compete against T3 (I'm T2 now), because my skill won't matter in a fight with someone who has better ship, mods and weapons. Besides, there was a poll about matchmaking and people wanted to leave it as it was, from what I remember.
If that's not enough, we have to grind more for new ships - now it takes around 1 million credits more to get a T3 ship. That's also understandable, because now they come with pre-installed mods... but still I'd rather buy and install my own mods. An option to choose between a 'clean' and 'packed' ship would be nice.
Last but not least, a real nail in the coffin, when you combine it with higher ship prices and harder battles - loot is now worth 1/3rd of what it used to, thus instead of 60k I earn 40k per match won.
I really like Star Conflict, but making it more grindy and frustrating (mixing tiers) wasn't a good decision...