Personally, I think making throwing spears recoverable is the best course of action since the Pila's ranged attack is the recruit's primary method of fighting cavalry.
I'm a bit torn on this issue.
Flavor-wise, I find it interesting that we finally have actual-Pilum esque mechanics.
Functionally they are far too weak to justify this.
It was a mistake to implement both the ultra nerfs (down to almost a third of its original damage), breaking mechanic, and barring throwing from horseback simultaneously, as we now only know that they are not a useful weapon at all when you do all of these, which anyone could have told you to start with.
We gained no useful information from rolling out the changes together, and functionally lost an entire weapon category from the game.
I would love a universe in which the Pilum is a bit more dangerous, does extra damage to shields, and breaks on impact as it does now. If this is too good for Recruits in most game modes that is an understandable argument, and we now live in a Bannerlord that has separate perks for separate modes. Put a spear on Recruits and move Pila back to Legions, or restrict Pilum on Recruits to captain. Hell, give Recruits a slightly inferior Short Pilum and a full Pilum to Legions even.
I have taken the removal of Pila from Legionnaires very personally, as the Spear Infantry have retained an identical or even slightly superior throwing spear for no apparent reason while my Legions were robbed of theirs for "balance".
Take all this with a grain of salt, as the captain mode Throwing-Spear Clan Warrior was peak Bannerlord game design in my mind (even though the Ash Throwing Spear was absurdly overpowered and needed some nerfs). It was an amazing tactical choice to have the capability to nuke an incoming Shock charge as light infantry but then be vulnerable to horses, archers, or repeated attacks from almost anyone and be relegated to a support role for the rest of the match.