Out of interest, what do you think of dedicated busways? One of your main issues with trams is that the gaps between stops can be really large, but on busways they can be bigger than on Metrolink. The Leigh to Manchester busway may well have increased overall road public transport patronage, but historical parallel services have declined. Is that acceptable?
What about the Translohr system, which are basically trolleybuses but look like a tram?
https://en.wikipedia.org/wiki/Translohr
Have you actually investigated what happens when proper integration actually happens? Have you actually spent time travelling around on buses in integrated areas to see how it really works? The Netherlands should be your idea of hell, given it has the highest cycle use in the world and largely follows continental style integration. But that doesn't stop investment in buses. There are a lot of dedicated busways and there seems to be always busway construction somewhere in the country. Buses often have priority at traffic signals, with buses equipped with transponders to turn lights green. Very high frequency bus routes are rare, with typical urban frequency being 15 minutes, but most suburbs and large villages are served from early morning to late evening, seven days a week. Fleet replacement is continual. If anything, quite modern buses are withdrawn from service rather quickly. Some buses are sold to central/eastern Europe but many simply get scrapped early.