That's certainly subjective as to FP+ being easier with the old system...and a big rabbit hole to go down, so we won't.
There's no real right answer to your question. I'd actually say that evening is less crowded than mid-morning through late afternoon/early evening. I'd say peak crowds are roughly 10am to 7pm. Your strategy will depend on what you want to do.
We're not commando style touring people. We won't do 9am to 10pm in the parks. So if our plan is to be in the parks for the morning then we'll book our 3 FP+ for the morning. Then we'll roll a 4th FP+ continually until we leave. If we decide to come back later that night, we'll pick up another FP+ as available. If our plan is to be in the parks for the evening, and we decide to make a quick stop in the parks in the morning, we'll do the opposite...have FP+ at night and standby in the morning (we very rarely do this...PM park days are usually AM water park days for us).
More often than not, we book our 3 FP+ for the earliest possible times we are there. That lets us grab more and keep rolling it forward.