Some of the decisions which had very little consequence could actually have a purpose in the second season. If Lilly were to return, it would be a nice feature to have her angry/likely to go for your group if you kicked her off the RV, and friendlier if you didn't. Likewise, Kenny should appear if you let Ben die. It would also add more replay-ability to the first season.
In terms of choices, there should be more chances to actually influence the story. Things like the choice between Doug or Carley was an actual choice, even if it was purely cosmetic. More choices like that, and choosing between which character in the group to save, require almost nothing to implement and would make a big difference. Likewise, decisions such as cutting people loose - although they may not later influence the story - give you some sort of choice. It would just be nice to see some of those choices actually matter, too; such as saving Lilly and then being able to convince her not to go (even if she was scripted to die/leave soon after even with this), or being able to choose Omid/Christa to go down with you to help Ben.
One of the easiest examples of a choice which had literally no difference beyond dialogue but should have was The Stranger who captures Clementine. The only difference is a few lines about leaving him and his family stranded. It's powerful until you play through without doing this and realise it makes absolutely no difference to his mood. Working some softer dialogue in, where he's thankful for you not taking the supplies personally etc, would actually give the choice some meaning.
As for people complaining about release dates... I'd rather wait a year longer and have a game with a couple more story branches, better correlation between the two seasons and actual consequences from my choices beyond character's attitudes.