How could a 10-mana card be a problem in a meta where 90% of games end before turn 10 anyway? And Y'Shaarj requires a LOT of setup and deckbuilding restrictions.
I think it might not help that its such an aggressive meta that when you do get a game that's a bit slower and more methodical (which is where the fun is for some people) that it can be frustrating for the game to end that way. Fair I guess but frustrating.
I like slower decks, I'm playing a lot of spell mage with lunacy and aggro just blasts through it so it's fun to come up against something a bit slower so I can actually enjoy the main card of the deck. But yesterday I had 4 warlocks in 5 games (not the norm, no idea why there were so many) who can draw into their win condition at a fairly decent pace then burn 10 of my cards and put me in fatigue way earlier than a normal game, it's a bit 'unfun'.
But saying that, I accept I'm playing a sub optimal deck in a meta that unfortunately for me is also quick in general so I just have bad match ups at both ends of the scale.
I'm a bit on the fence with this. I'm not sure it's a problem as such or if it just feels really bad which makes if feel like a problem. I do think having them cost 0 is a bit much, this is almost always problematic in HS but saying that, it is only for one turn. You either reduce them to 1 cost permanently (which may actually be seen a buff seeing as you can then spread the use of them across other turns) or it gets really clunky in the wording etc.
Im leaning towards it being more of a 'feels bad' than an actual problematic interaction. It isn't warping the meta or anything, it's just very frustrating to play a full game, maybe both players have played well and amde good decisions but then this comes down and just completely slaps you but you can counter it with a lot of things such as heavy draw, being very aggressive etc.
I see Tickatus in a similar light, it punishes you for being slower and just feels bad to have it used a couple of times within the same game. On the flip side, it feels great if you slap down a Tickatus and spoil your opponents C'thun or other game plan so if I'm being fair, I think it might just be my 'feelings' that don't like this one.