Alright let me start by saying i completely agree Drg needed buffs. Their MDef was the worst offender, and their dps needed to be brought up a bit to be able to compete.
That being said, i think the changes are quite over the top. It has been estimated that the buffs to dragoon account for an overall 7% dps increase, give or take 1%. This will put them very slightly behind mnks, and significantly above nin, before we factor in disambowel for bards and trick attack. Once we factor both in, nin will be the lowest dps, slightly behind mnk, himself a bit behind drg.
As far as utility beyond disembowel / TA goes, nin will have goad, mnk dragon kick + mantra, and drg nothing. So far so good, although one could definitely argue that drgon kick and mantra is way more utility than goad and that it is thus unfair for nin to be behind mnk.
The problem i have with the changes though, is that it makes drg, which was arguably already the easiest of the three to play (although it WAS very punishing if you missed positionning), the lest punishing and easiest class to play.
All three jobs posses about 3 dot/buff/debuff to maintain up, along with a "normal" combo to fill in, so i will assume things are roughly equal from this PoV.
Mnk has positionning on all their non dot actions -- and even then, half of each their 1 2 and 3 combo parts are either on flank or side, so it is a constant dance around the boss to maintain top dps, although a miss here and there on the positionning doesn't screw you too much. They also have to maintain GL3, which is very easy to maintain most time, but quite punishing if you miss it.
Ninja possess one positionnal attack, to be used each minute on the back. Missing it makes you lose, for the minute, about 15 dps from the decrease in potency from TA, and about 20 dps from the lack of party wide damage buff. This makes it the single most harsh positionnal attack to miss, by far, in the game. On top of that, they need to keep up their jutsu rotation, which is a whole different rotation to keep in mind while keeping the rest of the rotation going and dealing with mechanics.
One can argue which of the two is harder, but there are arguments for both sides, and in the end they are probably both about as challenging / easy (depending on your opinion).
Dragoon, on the other hand, now possess 2 positionnals, one from the flank every 18 seconds, one from the back every 30 seconds. Those positionals are very forgiving. Actually, if you think about it, you can stay on the flank and only hit the back once every 30 seconds, making it have barely more positionnal requirement than a ninja. Moreover, if you miss the back on CT, you will lose 50 potency. Missing one is thus a loss of 5-6 dps for the 30 seconds, to compare to the 35 dps loss for a ninja for the whole minute should he miss a TA.
Actually, it is now completely possible for a dragoon to stay on the side of a mob 100% of the time and take the 6 dps loss. 6 dps is within the variation due to luck / crits / etc, which means that no one will ever be able to take the parse of a fight, look at it and say "this drg was 100% on the flank" without going into the gritty details of looking at how much he was hitting CT for compared to other attacks. Also note that when you factor the dps increase from disembowel to the bard, the drg will this provide more dps than a mnk even if he is 100% on flank, as this 6 dps is not enough to put them behind mnks.
Tl;dr: Is this really what SE intended ? For mnk and ninja to work their ass off, and drg be able to ignore 100% any positionnal, stay on flank full time, and provide more raid dps than any other job ? While changes to dps and resistance for drg were on point and put them in a very good spot, the removal of the need to care about pretty much any positionnal makes them the easiest melee class by far, and seems pretty unfair to both other jobs. In a tight fight situation where ninja and mnk will lose dps due to doing errors in their rotation, drg will pull ahead by quite a good margin just because of how simple it now is to play.