Yup, the tactile strips are dreadful. For a few months I've been going over them on my skinny tyres and they actually felt reasonable...if it's dry, and as long as you hit them straight on and don't need to take avoiding action for a dog or be-headphoned pedestrian doing something daft. Because you're locked in.
Then for the last couple of weeks I've been on my knobbly tyred MTB, and the strips have become a real nightmare. Knobbly tyres (I have Mountain King 2.2s) are badly prone to 'tracking' the rounded tactile ridges - it's not quite like the tramlining effect on skinnies, rather the knobblies seem to 'grab' the ridges and it makes the whole wheel swerve upexpectedly - and that's when I hit them straight on!
The 'flattened' tactile strips seem to suffer from no such issues.
Let's be very clear - someone is going to be badly hurt when these rounded strips cause them to lose control. This is not aesthetics. This is a safety issue here and now. I seriously hope that when the path is 'adopted' or whatever needs to happen, this is a high priority.