Personally i'm already concerned about segwit.
You know, a team of 5 or 10 people creates something, puts it in the wild and then millions of hackers try to attack it. See the odds?
once upon a time bitcoin was the job of one guy. even when it started to go places it was looked after by a small number of people. that is a very good point you have but i'm pretty sure these people know what they're doing. it's not like building something from scratch.
everything that's come after kinda tells us everything we need to know about trying to introduce complexity. someone out there is cleverer and nastier than the creator.