Alperton's no worse than many other urban canal areas, and probably better than many especially with the amount of new development going on -- which you may not approve of, but is much less grotty than what used to be there.
The same is happening at various locations along the Paddington Arm (e.g. Greenford) as developers take the opportunity to build overpriced canalside rabbit hutches to try and satisfy the demand for housing. Which is fine except the biggest demand is for social/truly affordable housing, which AFAIK is not what any of these are -- or at least, apart from the token minimum needed to get planning permission... 😞
Still the new effect is to move the area upmarket and de-grottify it, which is surely not entirely a bad thing, for example if visitors want to moor there?