For sure, there are benefits as you mentioned, while in favor of NL rules, I do really want to see every team on the same level playing field. You bring up an excellent point of Ortiz, but he is rare breed and now there will be 15 more slots to fill just like his. Granted there are plenty of teams that shuffle their DH's, but my point is why should a guy like Ryan Howard and the gargantuan contracts be afforded that luxury of hanging around with a .220 average. Hell, we have a guy who is treading to that territory in Matt Adams. He doesn't even sniff the career Howard has had, but he will be afforded a longer career of being big, sloppy and out of shape because he can occasionally hit it over when he isn't hurt, because of his body type. It is rewarding players past their prime or big and out of shape, but you are cutting out guys who can do it all on the field, because the homerun sells.
It is what it is, I am the most curious to see how long they give teams to get their affairs in order. There could be a few teams out there that could have a gripe if the rule is implemented by say 2017. The argument, well if we knew it would be this soon, we would've offered player A or B back in 2015 or 2016, because he would fit those specific rules.