League play is legitimately harder than regular matches. I routinely destroy in Merc. Moshpit and thought I would do much better in TDM league play. No. Stonewalled at Silver.
I would like to petition for a Merc. version of LP. Currently, you can join with 3-4 (forget which) teammates and STILL be put in solo. As I am the only person I know who plays this game (out of Masochist tendencies), it makes this even harder.