I think I agree with Mike on both counts.
- It's my guess that adding boost switches to Series electronics could significantly add to the wait time on a new bass. And as a mod to a used bass, it could take a very long time.
- I have a bass with Europa electronics and I really like the boost/cut switches. But on the other hand, my Series I seems to do everything I need for it to do, and I don't feel any need for the switches. So while I think boost/cut switches are very nice, and I think it would be great if my Essence had them, I don't know that they are a necessary addition to Series electronics. But then I don't own a bass with both; and there are some folks around here who do! And of course there may be some Series owners who do wish they had the switches.