[M. Bison]

The csgo ports of maps are typically >100MB (while compressed). The majority of current maps are <10MB and nearly all of them are <15MB compressed (de_lite and de_nightfever are 20MB).

I don't like the way Source handles file downloads and I've witnessed multiple occasions where players rejoin because they believe the download froze (which makes the download completely start over) because Valve was too lazy to include a download speed and total size indicator (whereas they did in csgo).

I think larger maps combined with new players will make a recipe for disaster. Keep in mind that it's commonplace for ISPs to have random bouts of transit/peering congestion and/or players simply having slow internet (DSL, cheap cable packages, unstable wifi, etc). Either they get hit by a 24 hour ban while downloading too long or they get impatient and simply leave.