As long as Obersoldaten exist, Falls in their current state are redundant as long as they drop 25% of their (rather mediocre) DPS per model drop. Non-concentrated DPS simply does not work well for 4 men squads.
Some things can be done to their timing and role, but ultimately their non-concentrated DPS is always going to be a weak point when IR STG / LMG Obersoldaten do have it.
Falls still are attractive due to the snare and camo regardless of obers imo.
They are a different flavor, harder to use but higher skill cap as well.
They are not bad infantry by any means, o ers are just easier...