wow very nice speeds to us 
to download faster. even for .....linux distro... *COUGH .... it takes me at least 20minutes to maybe 1-2 hours. so if i'm downloading 3 or 5times more faster compared to my current 10mbps, is better isn't it ?

And it's not just that. if your place has multiple users, the net bandwidth can quickly become saturated. so more mbps to be shared between users is better.

also for some services like 4k netflix streaming, 25mbps is the recommended speed. heck even some 1080p videos @ 60fps on youtube i'm having issues streaming without too much time buffering 
if all you ever just do is browse websites and just facebook, then even 5mbps would be more than enough (except for http direct download big files which benefit more from faster mbps speeds).
if that is not enough to convince, 10mbps will be the same price as a 30mbps package essentially. so why not just get 30mbps for 3 times faster download for the same price ? this is a no brainer.

But that said the 30 and 50mbps have upload reduction 30 is 5mbps upload, and the 50mbps is 10mbps upload. this only matters for people who stream on twitch, or private torrent users trying to rake in ratio for upload. or if your working from home and is important to be able to upload documents or files to a remote location. but most normal users this reduction in upload speed is pretty much irrelevant.
as for latencies why would it get worse. this and the old packages both use fiber the same technology. latencies should be the same 

in my experience latencies and dl/ul to europe is much worse compared to the US.