pixel_player92917201 Well, if you're going to feel that way about people having a different opinion, or having the temerity to mention countervailing facts, then content note: you may wish to look away now.
Competitions are a small part of the game. I'm not sure if you're speaking hyperbolically out of frustration, or if you're conflating 'competition' and 'event' -- a key distinction, and one I made expressly in my earlier comment. Said frustration being understandable from the lvl 699 point of view -- one that I get a first-person angle on -- as they've allowed that to fester for much too long, and then -- utterly bizarrely -- taken the time and effort to implement a brand-new mechanism to make that worse. But that's a different issue entirely, and one that's been well-ventilated elsewhere. (And maybe needs to be some more, but I'd like to stress the 'elsewhere' part, with a view to keeping this thread on-track.)
To spell out the modalities of adding new trains via competitions:
... and that's it. No other trains whatsoever in this event, an exactly similar situation in other Big Events, and generally no way whatsoever in recurrent comps and mini-events comps.
Contrast that with the non-comp part of the event:
and not to be neglected of course, the small matter of:
which is now essentially the only way for level 699 to get normal keys at all, the only other route to get additional locos. (Other in both cases than via daily activity-strip bonuses.)
So if what you want is more trains -- or indeed more parts, or keys, then I can in fact only reiterate my earlier advice: care less about the competitions, and more about the 'solo' part of events, where most of the loot actually is. If that's not an option, then you can certainly lobby Pixel directly to make your displeasure and suggestions known, but I personally wouldn't hold out much hopes of that producing drastic changes fast. Or continue to air them here by all means, but the likely result of that is that Pixel don't even bother reading them, and other forum users critique them.
The 'mix and match' groups suggestion isn't terrible, but certainly considerably complicates matter if they were to combine it with the existing 'level brackets' and 'by time' criteria. It ends up looking a bit like the World Cup draw, where Israel isn't in Asia, Armenia and Azerbaijan can't play each other in the initial stages, etc. By the end of the event, it'd be looking for a group for you separate from 78 different people, potentially meaning that many part-filled open groups at a time. I don't know exactly how many players there are in the 500-699 bracket, but I can tell you it's a lot less than 10m. Some of the names are starting to look pretty familiar... Less awkward to do on a consecutive-comps basis than a whole-event one, which might still ease some of the pain.