I imagine they delayed the game because of how well it did preorder wise on Steam. They've said nothing in regards to which version it would be and what has caused a separate delay on the netcode on top of the game itself. My guess is they thought this wouldn't be a worthwhile venture and were about to release the basic version of Last Round (last gen doesn't have any of the new stages, textures, and hair styles).
A modder with a few hours of spare time can make an entire costume pack(which is basically 2 to 3 different costumes with slight alterations or colors for the same 10ish charactars) for every single character for free vs the outrageous $15 to $20 per pack. I'd go as far as saying they can make even better costumes with higher quality details and textures in the same time frame. They can even make them fully nude, as the crappy string bikinis they've been releasing for the same prices.
Besides the Legacy and casual collection where every character got real detailed and unique costumes. They've been especially underhanded with most of these packs, but it's also been a great source of revenue for such little effort. Modding would pull the rug under that. It would also expand their player base. The whole modding comment by Team Ninja is really shitty when you think about. They'd rather prioritize their short term income at the cost of their player base and long term income.
Last Round is a very lazy update in itself. 2 stages, 2 pallate swap characters(Honoka is literally using Marie Roses model), minimal next gen updates, PS3 and 360 missing the majority of the new content, PC release with no solid information or release date. Of course Capcom has done worse with Ultra SFIV, literally ripping content from a forgotten fighter. There's actually some new content in DOA5 LR.
There's no reason DOA5 couldn't be the premier 3D fighting game. Very high quality gameplay with tons of depth done in a very cohesive and understanding way that most people could pick up and play. With tons of flashy stages and cool costumes with easy to pick up deep gameplay. DOA has always been an progressive innovative fighting game that marched to the beat of it's own drum. But the emphasis on sex and bikinis takes so much away from that. It's not the fact that these things exist in the game that's an issue, it's the fact that it's so front and center. DOA is like being the most qualified applicant, but showing up to an interview in a string bikini.
It's so jarring to watch DOA on streams. You'll tune into a stream and the grand finals is a character in a bunny bikini fighting a character missing half her costume.
DOA5 was supposed to be about fighting and being a fighter. Taking combat to the next level. Taking all the ideas of past DOAs and streamlining them into gameplay. Taking the female characters, making them look more unique and relatable, dressed to fight. Virtua Fighter was being collaborated to help cement this new era of DOA and celebrate the series for its roots. Then A few minority pervert otakus start screaming the loudest and Team Ninja does the biggest 180 in history. Ayane and Hitomi get severely altered faces and bigger tits and more revealing costumes than they did in the beta. I'm a fighter started becoming a soft core porn slogan. With greater emphasis on sweat and breast jiggle and female models becoming a focus for the development team and marketing. All that said they still managed to make a really solid engine inspite of the increased focus and priority on sex.
The first and only new female announced was Mila, dressed like a tomboy, decently proportioned (as are the added Pai and Sarah from VF) unique relatable look and a fighter with her own personality. She represented everything DOA5 was supposed to become. Here we are with Last Round and all the new females are progressively worse and worse, but Honaka is especially offensive given the original direction of the series. No thought or personality, the whole idea of the character isn't even thematically coherent. She's advertised as being a clone with the biggest pair of tits(soft engine redeemed said no one). Using another characters model and with nothing unique to add to the series. She represents everything DOA5 was butchered into. A soulless pair of oversized tits.
/rant