FP+ has me secured in knowing that the attractions I want to do I will do weeks in advance, not the day of. No uncertainty at all.
My ADRs and FPs will not collide, again sonething not known until the day of under the old way. I know this now weeks in advance.
We are already planning our park hopping around the FP +, under the old way we would not know when our times were until that day, making Hopping harder to plan.
Hot events like Frozen M&G would be a unknown to us under the old system, I now know we will be able to do it for sure with our FP+, A big improvement for us.
Everything being tied to the MB means no keys, no cards, no paper tickets, just the band to do everything, that's immersion to us.
The possibilities of the MB in the future are great, to tie a unique person to a band gives WDW the ability to do all types of immersive experiences.
The new system is a great improvement to us. If it is not to you that is fine. We all do the parks differently. No one system is going to fit everyone. The system is not going anywhere, I would try to adapt to it or find somewhere to spend my money that better fits my style of visiting. At least that is what I would do. I would not spend thousands of dollars if the trip made me unhappy.