I can agree with this. There have been quite a few times when I've tried to go off the beaten path to escape higher-heat pursuits, only to run into the one tree in an entire field that can't be taken down.
What I'm more curious about is how the game determines when to call for reinforcements for the police. I've had chases on Heats 3 & 4 with just one or 2 cops on me for several minutes with no backup calls, and I've also had a couple instances on Heat 5 where I've had 5+ cops on me, not including a helicopter, and the game decides to make a backup call, despite me already being totally swarmed. TKOing cop cars on sight has also become my preferred way of avoiding a chase, especially if I'm on my way to a meetup or a safehouse. The fact that cheesing them is the best method of avoiding a chase is a little blegh.
Also, totally hate the Heat 4 Undercover Camaros. Specifically, I hate that they don't show up on the minimap when patrolling. It's incredibly annoying trying to duck and weave around cops avoiding a chase, only to come around a corner and one of the Camaros is in front of me. Since I've slowed to a crawl avoiding other cops, it's a guaranteed pursuit, which is very frustrating. Strangely, you can hover over them on the big map if they've spawned in, even though their symbols also don't show up there.
The cooldown is an improvement over the system in Heat, where you would only get 3 gas station repairs at night. I'm kinda ok with the cooldown system, because theoretically you can go much longer during the day/night cycle without issue.
That being said, my problem is that the cooldown timer (which IIRC is 4 minutes) is the same no matter what at every heat level. IMO this should scale with whatever your heat level is. 4 Minutes is fine at Heat 1 because cops aren't too much of a threat and it's relatively easy to get out of chases. However, Heat 5 is a different story when you have the fastest cop cars, as well as the F-150 SWAT Trucks on you, and by Week 2 you're pretty much guaranteed to get to Heat 5 almost every night if you're trying to maximize profits. IMO it should scale down by 30 second increments, with cooldowns at Heat 5 only being 60-90 seconds or so.