In terms of raw numbers comparison:
DMM:
174 units
42 events (38 without subjugation + drop increase)
7 revivals
9 story missions
Awakening
Nutaku:
132 units
18 events
Also a couple of patches as well yea?
Units wise we aren't missing much of anything. We can live without any of the event units listed there. Most occupy a certain niche or already have better or equal alternatives.
I personally would like to see us having Misha (she does makes some missions easier due to her affection bonus being +ATK and can pretty much replace Elaine in any situation), Dancer Waltz (having a min-cost + max skill Dancer will be quite useful as the game progresses), Claire (Gold units in general are questionable to Awaken due to the cost of Awakening a unit, but Claire is actually quite useful. Gold units are cheap to max level and Claire gets a powerful passive after Awakening. If we do get her as much as DMM, she will also be min-cost as well), and Moldevort (free Platinum Mage with a useful skill). All, of course, subjective for each individual.
One serious biased want is Aisha. Aisha best unit period. She is an absolute blast to use. Just recently Awakened her and still can't get enough of her. Now just debating if I want to Awaken her skill or not. Full screen nuclear blast vs. lower cooldown, tough choice. We will never ever get her here on Nutaku though, unfortunately
Something else we miss is a ton of Sacred Crystals from all the missed events (and for those who missed the events that are the subject of a revival, even more Sacred Crystals) which are quite important for free players. Since we have the advantage of seeing the progress of DMM, we can easily judge which event units we don't want/need and focus our Sacred Crystal expenditure on better units/events. Also events means silver unit farming. There will always be a need for silver units - whether for class evolution or for awakening.
As for the Desert Story Mission set, I think this is pretty important. The Desert missions are all significantly more experience productive for your Prince and your units. From here on out, all new Story Missions will have better EXP per Charisma for your Prince than the previous mission up until the final one (which rewards you with the Prince Awakening title). These missions also introduce new Bronze units with the passive 'Veteran's Teaching' which boosts their given experience value when used as fodder. All these also missions drop 6 units total and majority of them with a 4 Bronze 2 Iron split. Serious unit experience. The only downside: very low gold per charisma reward. Coupled with how fast you will be leveling your units gold will seriously be an issue - especially for newer players and even some freebie veterans.
Overall are we missing much? Mmm... Not soooo much. Depends on how much one weighs the missed items. I think missing out the Desert missions and the Sacred Crystals from missed events to be quite big. Would love to spend my Charisma more efficiently and have more free Sacred Crystals to throw around to prepare for Awakening. (Also willing to spend thousands for Aisha)
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Side note: the longer we delay Awakening (until the point where 100%'ing events is very difficult to do) the better. ESPECIALLY if you are a free (even low spending) player.
Awakening is a SERIOUS grind.
Awakening requires a unit to be MAX level with MAX affection.
Orb specific missions cost 90 Charisma to do.
Orbs have average to below average drop rates.
Platinum+ and non class-evolving units (EX: Princess) cost multiple (up to 6!) Orbs.
Specific class Orbs will only drop from a single day per week.
The Awakening fairy, Nias, costs 100 Demon Crystals.
Awakening also requires 3 CC'd Silver or 3 Gold units (mix of the 2 is acceptable [EX: you can Awaken with 2 CC Silver + 1 Gold]).
After Awakening a unit, that unit is actually WEAKER than before Awakening for the first ~30 levels (class dependent)! Need to have fodder units prepared for post-Awakening.
Also events are always a threat! Balancing where you spend your Charisma and Stamina will slow your awakening progress.
I personally had a run of 11 Orb mission attempts before an Orb I wanted dropped. And for the specific class I wanted Awakened it was only 1 of 3 Orbs. 990 Charisma over the period of 3 weeks (because, remember, only specific Orbs drop on each day!) for just 1 of 3 Orbs. Yeah, it can really suck if you are unlucky. So it basically still took me a month to Awaken a unit whom I already maxed, with all the fodder prepared, and the gold banked because of RNG (and me not wanting to spend my SC).