The only way to lose progress is when you get penalties and getting banned, low priority queue also doesn't count as penalties if I recall correctly. Otherwise everything you do, is progress, doesn't matter whether or not you're honoured after a game, the honour will level up as you play; being honoured only means you're leveling faster.
In other words, there is no real reason to reveal the leveling process to the player, because you KNOW you're progressing as long as you're not slapped with a ban. And you can SEE for yourself that you are doing pretty darn well with your behaviours and that other people like you, if you're receiving honours in the post-game lobby somewhat consistently. There is no reason to make the process visible, because it introduces no benefits as all of its mechanisms are clear as day, it only introduces the concern that people will start to seriously game the system once the progression bit also becomes transparent.
Gamification is that you're making something into a game-like construct. Pokemon Go is not one of them, because it is a gimmick that say "hey do you want to play Pokemon for real??" rather than that having people going outside to be its original purpose; and it also got old super fast too, most of the people have left the Pokemon Go frenzy behind by this point too, so it's not like it really worked. Gamification is that shitty library account that says if you keep borrow books you can "level up" and get some sort of goodies, gamification is that gym membership that says you can get a free personal training session if you work out enough hours in their station, gamification is that shoddy "augment your preorder" of that Deus Ex: Mankind Divided fiasco and other stage-unlocks in Early Access titles, gamification is the forum member status going from being a "Newbie" to being a "Veteran" based on how many posts you've spammed etc etc. It works in certain context, usually when we talk about things like kindie study programs or something, but it utterly doesn't in many others.
When concerning an audience mostly filled with young adults, many of which are as cynical as you can probably imagine, and that you're trying to promote behaviours like "honour" to those people, making that behaviour promotion into a game itself is the least you want to be doing.
Because let's be real, despite the name being called an "honour system". It's actually just a carrot on a stick, because Riot already has enough experience to know that gamers don't really give a shit about ethics and honour, so they go for the hard way to use rewards to chain the player base and force them to do good, and completely cut your goodies if you're misbehaving. No rider is ever going to tell their horses how many more steps they take will they get their carrots, because the purpose is trying to get them walk as far as they can, not to form a routine; this is the same for this honour system, Riot is not going to tell you how "good" you have to be, they want you to be as good as you can possibly be.
And making it transparent destroys that purpose.