It's entirely possible their goal is to build their fanbase in Estonia this way, they signed Arrak and Slessarevski before who are even weaker prospects.
No. Kombe will play mostly in 2nd tier Finnish league "Mestis". He has upside with the puck and might be a backup stuntman if Jokerit struggles with injuries.
Since Jokerit doesn't have a proper farm team in the top national league "Liiga", Jokerit has to find players that are relatively young and "too good to Mestis" but not good enough to play regularly in Liiga. Tough one I'd say...
Hopefully the will find out a way to work with some Liiga teams and loan there a few players in order to keep the best prospects in the system. Now there is not much sense for the best prospects to stay with Jokerit, since there won't be any khl games (maybe 1 or 2) for them and they have to play in Mestis or U20 league.
Jokerit loaned Hirvonen to Liiga a few years back after the authorities have deemed Liigas ban for loaning Jokerit players illegitimate.