to throw in my 2 cents,
I feel like the new marine dex OVERALL is not that bad, BUT there are points of abuse that I find disheartening.
Drop pods where perfectly fine at their DA point cost, and are now an ABSOLUTE steal at their current price. The fact that they get a squad where they need to go more reliably then anything in the game, and that the new "drop pod assault" rules makes them even more worth their money now is simply absurd.
There is absolutely no reason to take a rhino over a drop pod, expecially given the point that you can litterally double up on your first turn units in a dawn of war game by simply feilding them.
Now granted, I have NO problems with drop pods, or their rules. Only their price and the fact that if you want to get a squad somewhere on the board, there is LITTERALLY no better transport option then the drop pod, and it just happens to be their cheapest option. The balancing math behind that just seems flat out wrong to me.
And also, I have a personal gripe about the return of hero hammer. I personally don't have an issue with the special characters or their abiliaties, nor do I think you should need your opponents permission to use them, but I do feel having NO restrictions on them means that you see them more often then you see normal characters, and I feel that what is included to give army's "flavor" is instead simply making army's bland. Instead of building a configuration of a standard character (albeit there where some archetypes for those as well.) at least its a bit more variaty then seeing Elderad being droped in every eldar list, and many other special characters condoning game altering benifits.
Personally, I was a big fan of the PRE eldar dex way of doing it in 4th ed, given minimal point totals to certain characters and their engagements in order to "curve" their impact. As I am seriously getting tired of seeing characters like Elderad be able to relocate an entire army in low point engagements, while characters like shriek, kanto, or other chapter masters allow you to take (an hq choice and then some) for nearly the same cost as a generic hero. I think it just de-insentisizes customization and variaty in favor of using these "archetypical" power houses. And while the marine codex is not the only one that does this, I am disapointed to see the trend continue, and if anything, only be pushed into more of an extreame with the new dex.
I personally don't have an issue with any rule that is there in the current dex, but there are some gross imbalances in the points costs of some of the units that I feel is a bit unfair. But this is just for units like the new discounts to assault squads, and the like. Rule wise, I think its a great dex, i just think it needed ALOT more play testing for points balancing.