PVE part should still be locked behind DLC, so quests, dungeons, telvars are still only available to those who sub or brought DLC
The reason behind this is simply that IC, while being a pvp area, does not feel "realated" to cyrodiil pvp at all due to they are not part of "win condition", and that's because they are behind a pay wall, not everyone would be able to access it.
The way I see it, capturing at least 4 sectors of IC should also be an objective of emperorship, this makes alliance must fight a two front war, more tactics and cooperations are required (for example, sending the elite team into IC while the zerg push in cyroll).
But to do that, like I said IC (at least pvp part) must be accessible for all to prevent unfairness