As an Acid user of several of its previous iterations, I was excited to see the release of Acid Pro 8. I'm less excited now I've used it.
Firstly the colour scheme takes some getting used to, and there are parts I never will. Like 8% of males and 0.5% of females I am colour blind. AP8 isn't colourblind-friendly. These days, developers should automatically look make their products inclusive; this isn't the 1990s.
Second, there don't seem to be many tangible improvements to the previous version. I'd expect it to be more stable, but one crash today doesn't fill me with hope. The lack of sidechaining, a fundamental feature of DAWs, is particularly disappointing.
I'm disappointed to see so few improvements after parting with £100. I'll use it plenty, but it just doesn't feel like a £100 upgrade.