In my experience, and believe me I have a lot of it. Played in some of the best PVP guilds in the game as archer and mage both.
Balanced is more important on say an Xbow than it is on a Moving Shot bow. If you're running them down chances are you aren't getting hit and the balanced isn't really needed. On an Xbow you got to stop to take the shots and it's a better wep to have Balanced on imo.
For PVM... I'd try to get a comp/xbow with Max SSI, 35+ DI, and High HML.. Anything else is bonus and depends upon your suit (HLD/HCI, etc).
With the bold, what point are you trying to make?
Moving shot you can do with heavy's, composites, and repeaters. It is like I said. Relying on a crossbow for the AI and switching to moving shot bows. This is just one play style.
As an archer you should ALWAYS be able to setup your first shot. This can dictate many different game play styles as well as types of bows.
Not to crack down, but the balanced is personal preference. I prefer unique builds coupled with distinct moves. Not only does it not create a cookie cutter template, it keeps the opposition off balance.
Better than the flavor of the week, whose moves eventually get dumbed down because of too many complaints. I have kept the majority of my templates the whole time I've played UO.
While some people like 2 hit kills on a constant basis, I find it to get old and boring after a while. That is just a cheap kill...not PvP. A descent bow can have balanced. Is it required...depends on your playing style. Is it a
MUST have for everyone? Long story short...
no.
I myself use
spell channeling bows. Is it required for me? No not really. It just fits into my template like balanced does for yours.