Let's not judge about our capabilities based on a single warscroll. Oldblood is ok. His weapons are stricktly better. I think, Greatblade is the best now, because of Rend -3. We can give Oldblood the Ghyrstrike for maximum. 3 attacks 3+/2+ -3 D2 and exploding 6's are very nice. And he can command himself for additional +1 to-hit. There are a lot of other realm artefacts to play with. But I doubt it will be worth it.
+1 save, as stated above, is strictly better then ignore rend -1. And arguement that it was our special gimmick simply don't work, since we weren't the only faction to do this - at least one Sylvaneth Artefact could do the same. And rules are just rules. They change and change often. I am sure that if they just chaged stardrake shield to "add 1 to the save rolls of the model bearing stardrake shield" everyone would like it. GW just streamlined warscroll, removing uneeded rules and adding it to the profile itself. Besides, maybe Shield of Aeons will provide now comlete ignore rend on top of 3+ save?
Special rules are also better. Exploding 6's makes him basically old sunblood. Old ability was bad because limited range on worked on models, not on units. It was hard to take advantage of. Command ability was nice, but was very gimmicky for modern AoS standards. New one is better in terms of powerplay. Blant + to-hit, wound etc. are the best buffs. Boring but effective. Especially if Sarurus will hit on 3+. And it has a good range.
And if they remove skinks with pipes and shields, it will be a huge insult. We should spam them with collective discontent letters - facebook, rule team mail, everywhere. Each seraphon player has at lest a couple dozens of them, I'm sure. Buit and painted. But I still think, that they didn't include option for warcry just because another option would be redundant. Or they wanted us to get another box to build unpolular wargear option.