and why do people think he is bad or underwhelming.
People are spoiled by the broken planeswalker that infested the last standard. Nowadays if a planeswalker can't win a game alone is bad.
In fairness, wasn't one of the principles of the Planeswalker card type that they should be able to win the game on their own? Certainly not easily, and they've drifted away from that principle with time. Notably in War of the Spark where a lot of the uncommon walkers couldn't win the game for you, though other walkers before and after similarly couldn't win games for you alone if left to their own devices (and were not thought of highly more often than not). Still, Planeswalkers were always intended to be game winners and there is a level of expectation from players that new walkers be more on the flashy, impressive side.
That doesn't mean they need to be broken, there's obviously a balance to be struck. This Jace is just on the more subdued end of that balance, useful but strictly support for the actual game winning cards in your deck. It's not surprising that the response from many is just whelmed, and I'm not sure that has anything to do with being spoiled by broken walkers in Standard.
and why do people think he is bad or underwhelming.
It's certainly not bad, just not very flashy for a planeswalker. He can't protect himself, though creating a second copy offers a bit of cushion. "All he does" is scry and draw cards, which I don't think anyone can dismiss as useless, it's just not game winning on its own. Consistency and card advantage in a cost-effective package is always going to be appealing, if in some cases underwhelming.
Effective utility will win games, even if it doesn't have much wow factor.
I don't like this card at all, but it's certainly an interesting design. I like that you can get into a cycle of scrying and drawing into lands, since that'll likely be useful in Zendikar.
Did we know kicker was coming back? Will they bring it back and landfall?
In fairness, wasn't one of the principles of the Planeswalker card type that they should be able to win the game on their own? Certainly not easily, and they've drifted away from that principle with time. Notably in War of the Spark where a lot of the uncommon walkers couldn't win the game for you, though other walkers before and after similarly couldn't win games for you alone if left to their own devices (and were not thought of highly more often than not). Still, Planeswalkers were always intended to be game winners and there is a level of expectation from players that new walkers be more on the flashy, impressive side.
That doesn't mean they need to be broken, there's obviously a balance to be struck. This Jace is just on the more subdued end of that balance, useful but strictly support for the actual game winning cards in your deck. It's not surprising that the response from many is just whelmed, and I'm not sure that has anything to do with being spoiled by broken walkers in Standard.
Archatmos
Excellion
Fracture: Israfiel (WBR), Wujal (URG), Valedon (GUB), Amduat (BGW), Paladris (RWU)
Collision (Set Two of the Fracture Block)
Quest for the Forsaken (Set Two of the Excellion Block)
Katingal: Plane of Chains
It's certainly not bad, just not very flashy for a planeswalker. He can't protect himself, though creating a second copy offers a bit of cushion. "All he does" is scry and draw cards, which I don't think anyone can dismiss as useless, it's just not game winning on its own. Consistency and card advantage in a cost-effective package is always going to be appealing, if in some cases underwhelming.
Effective utility will win games, even if it doesn't have much wow factor.
Archatmos
Excellion
Fracture: Israfiel (WBR), Wujal (URG), Valedon (GUB), Amduat (BGW), Paladris (RWU)
Collision (Set Two of the Fracture Block)
Quest for the Forsaken (Set Two of the Excellion Block)
Katingal: Plane of Chains
Did we know kicker was coming back? Will they bring it back and landfall?
Archatmos
Excellion
Fracture: Israfiel (WBR), Wujal (URG), Valedon (GUB), Amduat (BGW), Paladris (RWU)
Collision (Set Two of the Fracture Block)
Quest for the Forsaken (Set Two of the Excellion Block)
Katingal: Plane of Chains