I dont know I see a lot of interesting players here. Lot of interesting and promising young guys which can really be a good adittion at WC or at least get a chance in pre wc tournaments.
There is Stransky, Lakatos, Flynn, Najman A., Tomasek, Kubik, Horky, Kodytek, Kousal etc. all of them has really good seasons behind them and can fight for wc spot and show off there.
The more experienced guys like Repik, Sedlak, Hyka, Radil, Holik (really want to see him in NT), Sobotka, Nestasil, still solid guys.
Also dont get why consider extraliga worse then other top leagues. Sure liiga and shl is maybe a bit better, and nla maybe also (although I would say is more on par with elh). But its nothing drastical and for example with nla, There is one big advantage we have against them. If you look at top 50 scoring in nla there is only like 11 swiss guys, the rest is foreign players. But in elh there is almost 40 (38) czech players in top 50. So yeah nla is quality league, maybe even more then elh, but the quality there is produced by foreigners and not by swiss players.