SES supports DKIM (and DMARC and SPF). It has reverse DNS, just not for your domain (that's mostly just useful for whitelabeling).

The biggest two problems are that A) You're using AWS SES (which lots of people do, so it doesn't have a great rep) and B) You don't have a static IP address (So again, you're sharing the email IP reputation with everyone else).

So it will work, but you may not get the best deliverability. Of course, if you're users interact with you already it may not matter and get delivered just fine. Also seeing is how this is a shit ton cheaper than the "big" players (like Marketo and Eloqua) it might be a good stopgap for someone who wants to send lots and lots of emails but can't afford the expensive toys.