Yeah, as said, certain units do benefit from large squad size, but they tend to be focused on getting lots of extra benefits for squad size ("if you have X or more models"), or are trying to maximize the benefit of a buff (such as Veterans of the Long War plus Shoot Twice stratagem), or because having just 1 member of the squad survive allows for very strong plays (Necrons troops).
These mechanics aren't necessary for a horde army, but I find that they tend to match up best. If anything, I really wish GW would push for more "if you max the squad, get this for free" type things. The ones that are already in the game work really well, but this helps.
|