There may be a myriad reasons for the seeming lack of urgency in arming Ukraine, but excuse me if I believe a significant aspect of the delay is a potential lethal mix of cynical political maneuvering and gross ineptitude.
Behold the systemic idiocy that landed us here in the first place.
I hope there is some overarching logic, i.e. letting Russia spend itself, with genuinely defensive weapons only, from the west. Thus time for Russia to figure out that this is not winable.
The window for Russia to realise this is now gone.
Ukraine has managed to hold them, hurt them alot, and is starting to turn them back.
Ukr has had a lot of kit, all the polish tanks, M113's, arty etc. Its probably still forming and training new units, I know the UK is training infantry, 10,000 or so.
Even Germany is now shipping big stuff, I'd love to see a gepard in action.
Really we have 3 months left of this year, before the weather shuts everyone down, so maybe we will see kherson retaken, and then Ukr will dig in, and order 1000 drones, to keep the russians warm through the winter.