First of all, congratulations on becoming the new mod of HYO. However, I would like to address what I see to be a pressing matter. I strongly disagree with you on the idea of having one show at a time. This forum has succeeded for years on end with two, even three shows at a time with plentiful participation. Limiting this to one game at a time would be a significant detriment to both participation and quality. Let's say that, on average, 15 people sign up for a show. Only nine of them get to play in the game, with some of them having very limited interaction. (If the ninth player doesn't make it on "stage", they only have one bid to show for their participation.) The rest have to sit out for the entire month-plus that the game is going on, which is extremely unfair to them. The players are just as important as the host in my view, having been both - good hosts make for good shows, yes, but good players make for great shows. As for quality, since shows can take over a month to complete, having one show means that hosts will be inherently placed in a "time crunch", where the quality will diminish as they try to rush their shows to be over as quickly as possible. With two games at a time, this crunch was still in place a little bit, but it was significantly softened by hosts being able to, well, host at double the rate. This is also incredibly frustrating to players, as if a player misses a 24 hour deadline, they set the entire forum back 24 hours instead of just one game.
If the issue for you is quality, then perhaps we can settle for a compromise. Maybe we should ensure that at least one veteran is hosting at a time so that people only interested in spectating have something to focus their energy on, while players have the opportunity to participate and be the "guinea pigs" for an up-and-coming host. Speaking of which, I could see the one-at-a-time policy being incredibly frustrating for a new host that may suffer from initial setbacks, as I myself suffered from way back in 2011. With another game going, me being grounded for a day because I forgot to take out the garbage (yes, this actually happened...) was laughed off as an afterthought; if mine was the only game, this event would have been a catastrophe.
I strongly urge you to reconsider this stance. I am completely fine with increased auditing of material (even if it seems unnecessary given that the games as of late have, at least to my eyes, appeared to be of superb quality), but I feel that having only one show at a time apart from the usual two would be disastrous and perhaps fatal to the Host Your Owns that I have come to know and love over the past half decade. I know that you are striving for quality and not quantity, but why not both?
EDIT: Further on the "at least one veteran" compromise - perhaps we should be encouraging new hosts to have traditional shows while allowing the more experienced hosts to be more flexible with the show's format. From experience, I assure you that new hosts struggle to present radical concepts that often crash and burn, whereas veteran hosts are able to flawlessly present experimental concepts (for instance, Teddy's excellent HYO that just ended which featured all six games being original creations). I apologize if this sounds elitist, but my interest in doing this is in educating the next generation of hosts how to successfully host a game and make them feel more comfortable in making the games their own, which will no doubt lead to outstanding games from new hosts in the future. As for the veterans, I want the players to be happy and the forum itself to be prosperous, so having hosts that already know the ropes and provide top-notch quality is crucial for the forum's health.