1) You aren't the only one who thinks 1/level is too low, but most people have adapted, and we'll have to see if there are additional +Ability/Attribute points given out.
2) No, those Talents were boring and dull. I wouldn't mind more Talents, but interesting, and +1 [Ability] isn't interesting.
3) Summons are time-limited and cost AP to summon, so having four or so is probably the most you can get anyway. I can verify that one character can have two summons out at once, and even the same one twice.
4) I too would like more detail about how the new system works.
5) That's a new feature, no new features will be added, especially complicated ones like that.