Yes that's my current plan for my 1k spider army, but for 2k intend to do a grand alliance of moonies, spiders, trolls. Still no battle-line alternative for that other than 3 units of grots.
But good news for Moonclan getting new battle-line 'if's. Should make for some interesting new armies with tons of squig units, supported by single horde of grots rather than 3 shi77y units of 20.