As of 4.9, LW downloads 8 sources concurrently in basic versions for DSL/Cable connections, changing from 6 in previous versions. Increasing the numbers of concurrent sources for downloads is not something really desired as it would totally fill the upload queue of sharers. This means less download availability for others and a decrease in average download speed per 1 source of download, since the source would split more its upload bandwidth to satisfy downloaders. Also add that more connections means more overhead (ie waste of bandwidth not used either for dl or upload to manage connections) and you begin to see the picture here.
Or I would hope that you see that picture...
Ciao
