It can be a good car and still be lazy - I think both are true.
BMW makes good cars; nobody Is really disputing that. It being an EV doesn't mean it will be less good of a car. But
lazy it definitely is; they want to have a foot in the EV world, so that they remain relevant, but refuse to 'commit' to really designing a proper EV from the ground up. The excuse is that they think people want to 'transition' but that's not true; Tesla already solved that problem a decade ago, and EVs are no longer 'new'.
But to really build one from the ground up would require true investment of time and money, and they haven't done that. You could argue priorities or resting on their laurels or a dozen other things, but the design/engineering effort of it definitely isn't 'leading edge.' It's lazy; lazy isn't always bad, but it is always lazy.
(Doing things lazily is sometimes the right answer; let the other folks figure out the market and everything first, and just hang out and see where it goes, then jump in and try to do something real. That's a valid strategy many are following right now)