I’d argue that having an entire guild apply one TW omi can have a much greater beneficial impact than all members applying a TB omi.
And this is absolutely this is the traditional analysis. One of the things I'm pointing out here is that if you think of Omi resources as a chance to purchase other resources (an investment here gets me X more territory points which yields Y more rewards), then the traditional view makes perfect sense.
However, there are different play styles, and some people may choose to value actually getting to USE the Omicron, because it's fun and games are meant to be fun.
This makes establishing a single value very difficult. As you say, TB Omis provide little benefit in actual rewards until you're facing r9 planets where you're required to put so many of your GLs in platoons and have to find a different way to get through what can be very difficult battles without your most reliable and powerful toons. BUT if you're valuing play time, you have the possibility of using that TB Omi in 12 battles per month, while the TW Omi can only be used in 4 (and if it's a team you use on defense, you might never have the fun of playing with that Omi active).
Investment/rewards is traditional, but emphasizing fun and opportunity to play is a valid alternate play style and it leads to a different valuation.
I'm attempting here to compromise between the two different ways of looking at the game.