Hi! I’m an old Duelyst player (since KS early access version), so I’ve seen the daily quests system appear and grow. And while I like the current system, I’d like to make some suggestions.
Why limiting players to play 4 matches with a single Faction? You should choose what faction to play based on your wish to level it up or to test your new or changed build (or to grind victories with a super-deck - but what’s so bad about it?). So I suggest making the first mandatory quest - “Play 4 games”. For some it’ll mean playing with the same Faction, for others (more so casuals) - trying different Factions and decks. Faction loyalty is already rewarded with Faction XP, after all.
Some second quests take much longer to complete. Killing 50 minions can be done in a single match vs Wrathling-oriented Abyssians, while dealing 150 damages to generals takes 6 wins (reducing enemy Generals from 25 to 0, some final attacks combinations and healing enemy Generals allow you to deal more damage per match, but that’s rare and doesn’t add much in the long run) with early concedings prolonging this quest even more. Play 8 games - a bit too boring. Either make it the first quest, or spice it up somehow.
There were some interesting quests earlier. I remember the quest “Win a match with a deck of cards with cost 3 or less” - it was an interesting experiment for me. Maybe add some quest like that?