new ideas...
 

multi downloading/upload threads(like leech ftp)
where you have a queue coming to/from 1 site and you say choose 3 logins and it will connect to site 3 times from 1 window and say start getting file 1/2/3 then move to 4/5/6 etc

editing queue while downloading(works from above feature)
allows remote queue additions since you can change dirs as you download and add more files from different directories as u wish

multi file getter(i only seen this done once and i forgot what program does this)

say you got a 500 meg file and you chose 5 logins to download it
each login would download its own 5 parts(im not sure how this is done) and when all downloads done it will rebuild the file into big 1(probably best to use some crc software to authenticate remerger)

some wild ideas but perhaps they be implemented

perhaps you are looking for download manager instead of ftp client?

nah download manager is usually to be sure download is good like dialup if it dies/etc but these are advanced functions:P