Alright Xtreme, I'll humour you, but first, let me tell you this; before you drop your opinion on how something should be, also mention why. Very important.
Boost core: I disagree, and it should be a definite value, not % based. The reason for this is very simple. Consider Boost core's alternative, the boost grenade. Let's say an Outrider gets an average of 4 uses out of the boost grenade before he dies, a Raider gets 5 because of his +25 health. Per boost, the velocity acquired by Outrider is greater than what the Raider gets, but since the Raider is able to squeeze in another boost after the 4 uses, the traits balance each other out. The balance here is between acquired speed Vs resilience.
But, as per your suggestion, if we keep it % based(let's say 20% as an example), both Raider and Outrider will get same number of boosts. What you need to observe here is that the gap in the gain in velocity is too large while the price is the same(percentage-wise of course). In a nutshell, keep it % based, and the Raider is screwed(that's how it is right now actually, both classes take 21% damage when boost core is used).
Shield core: Elaborate Xtreme. I personally don't have a problem with the current iteration of the Shield, with the core being immune to CG fire, 50% damage absorption from external fire, 20% absorption from self-inflicted(I'm unsure about this actually, so let me know if I'm wrong). Don't understand why you'd want it toned down to 30%, but I'd like to hear your thoughts on that before I say anything.
Dodge core: Agreed on the zero damage absorption part at least. If somebody uses Dodge to evade a rocket but gets hit on the head by a grenade, he should take full damage from that. All perks to this core unrelated to dodging, need to be scrapped immediately. I can provide suggestions to how Dodge can be improved, with a couple of abilities added to it, which are actually relevant to it's primary function.
Cores usage conditions:
25% energy requirement: I like this one. Something that's actually worth debating about. Maybe even add something like a handicap gamemode with this sort of thing.
Core Vs Flag Carrier: Alright, I tested this. The cores that work with flag in hand are OD, iOD, Shield and Dodge(what, is this like the 10th thing the Dodge can do? sigh...). Dodge definitely needs to be toned down on a lot of levels here, this keeps getting ridiculous by the minute, especially when it comes to being usable while holding the flag. Both Shield and Dodge need to be made unusable while holding the flag, no argument there. I'm unsure about OD, I don't think there's any need to do that, but I also think it won't make a difference either way.
No to iOD being unusable. Are you serious, Xtreme? Imagine a Sentinel not able to iOD because he has the flag, as if the already existing handicaps aren't enough.