I don’t really understand the “lack of character” argument. Most post-war houses are carbon copies of each other, with slight variations for the time they were built and the area. Also character can equal ugly as fuck like my old neighbour who had a horrible pebble dash all over their house. For our old house, character also meant knackered and is going to cost a lot of money. Give me lack of character any day!
New build estates can certainly have many problems. The numbering of houses is often completely non-sensical with 50 closer to 77 than 72 is! Car parking spaces can often be allocated and not near your home, you may only have one space. They can be really badly built and have numerous problems later as developers have focussed on profit. Gardens can be small and often overlooked. Rooms can be small and there can be a real lack of storage.
Looking at the new build estate near us, we would pay a lot more for a “similar” house. Except that new build is one parking space, single garage, less reception space, smaller garden, 2 double and 2 single rooms. Our current house has a double driveway, double garage, more living space and 4 double bedrooms. Also a bigger garden. Ours is about 20 years old. With a new build you pay more for the privilege of it being new and in theory nothing needing doing to it.
After owning an older, character house, I see the appeal of new builds. The layouts are often more suited to how you will use the space now, rather than forcing it with an older building. They can be more energy efficient, better insulated. Part of the development plans will often include an upgrade to roads and pavements nearby and some require community space like parks on them. However, I would be quite picky about a new build. I believe Redrow are one of the better big developers and obviously more expensive. Their rooms tend to be bigger and you do seem to be more spaced out with them. I would also consider smaller, independent developers because again they tend to not cram quite as many in, although you will have less community space on these developments. I would study the site plan very carefully and look at how far out of the town/village the development is and what is the likelihood of being in a school catchment (if needed). I would also get a full snagging report before moving in and knowing how developers drag their feet, ideally make it so we moved into one chain free so I could ensure all snagging was done without compromising the rest of the chain.