I agree with your summations and thoughts, Wagner. And, given the amount of work you have put into this league (and continue to do so), I will defer to you on how many teams is enough. In other words, I will support your decision. Obviously, it would be great to have more teams in the HGL; however, as you have noted, quality v quantity is important to consider.
Thank you for your response MrJ, I appreciate it.
As mentioned, it's completely new situation in terms of 0 managers exiting HGL after Season, so on other Seasons it's been simple enough to accept new teams to replace exiting teams.
While this is still theoretically possible that some of us 18 would cancel their commitment to participate to Season 5 ((and therefore it would be easy to take in replacing team(s)), I would end up thinking it's not likely that any of us would decide to exit HGL after Season 4 (cancel their commitment).
Also, it's good to remember that theoretically, nobody "forces" us to play HGL during one BB season, but I kind of prefer it to be it that way, for couple of reasons. (On the other hand, it would also have some benefits to spread HGL Season over 2 BB seasons).
So obviously one option would be to spread HGL Season over 2 BB seasons, and play only 1 match per week during RS and during Playoffs.
There would be some negatives with this, though:
First, at least to me it feels more clear/apparent choice to play one HGL Season during one BB season, also because it's been the tradition since Season 1.
Second, given current BB Pickup match limitations, it's not possible to arrange 2 BB seasons' worth of Regular Season Pickup matches at once. So we'd be in a situation, where we'd have to have 2 RS match organizing windows, second one in a middle of RS, and that always adds to the risk of things not going well/as planned.
Third - and this could be an important point - for some teams that are not doing well, it could feel like a bad design choice, as they would then lose like 6 months of playing time (instead of about 3 months), if their Season goes South and it becomes apparent quite soon that their Playoffs chances would be already diminished.
Of course there would be also other aspects (negative, and maybe some positive also?) within this theoretical change into playing over 2 BB seasons. However, this isn't a planned chance, just a theoretical speculation at this point (into which everyone who feels like it can contribute, if they so feel like).
As for future, it's possible to think of different scenarios in terms of adding new teams, if necessary (keeping in mind the current limitations that I wrote about in my previous post).
If it seems to become "a habit" that everyone currently playing in HGL decides to continue in HGL on next Season as well, then we might (or might not- I'm wrestling with this as to begin with I'd like to offer all current HGL teams possibility to continue, to reward continuous commitment...) have to consider the option to have a short Play-in league or Play-in Playoffs, into which possibly 1-2(?) worst teams during each HGL Season would participate into, just in order to give some teams possibility to join as well. At least at some point, that is, when their team is at least so competitive that they can actually beat worst team(s) in HGL, or at least beat some of each other who are also "applying" to HGL if it's the case that some current HGL managers decide to retire but there would still be less open spots in HGL than there are willing participants.
This would kind of mimic real world situation (relegation battle in leagues), however, with the unfortunate difference that worst teams after Play-in league wouldn't play on next HGL Season. On the other hand it would likely give teams that are not successful in HGL Play-in league even more motivation to train better to be able to acquire a place in HGL by succeeding in HGL Play-in league on next Season.