A new Advanced Wars? Where?
Dual Strike has a lot more content than DoR, but yeah, DoR is a more thoughtfully made game.
Naives are fun/useful to use now. Less power spamming. The Motorbike makes capping cities during an advance pain free, compared to have to march infantry or APC trains. AI has been improved, it appears to now hold back reserves to counter your inevitable breakthrough, although there isn't much that can be done for the build order since it doesn't/can't think behind the current turn. It sort of weights what to build to counter your army based on the value of the build. So throw a plane up and the AI will buy whatever the counters divided by the number of factories, so it still tends to end up with fair number of flak guns which the tanks run over. Because the AI is compelled to buy units every turn, unless given a large income, rarely buys top end units in useable quantities. DS builds flakguns to tanks at a 2:3 ratio, quite a few flak guns.
If you want a fix now, the old GBA games are quite good. There are fewer intricacies for the AI to **** up, so it puts up a good fight until you make a breakthrough, then it's screwed since it has no reserves. Although it has its quirks like APC baiting and rush'n'attack not a step back, attack at all costs.