Recycler definitely must remain stock.
After all, why change it after 10 years?

I believe that reaper could eventually come to his senses and make BZ 1.5 without any crap like server filtering, but don't hold your breath.

In the meantime, I'm experimenting with my own BZ mod (currently dubbed "BZ 1.41") with ODF changes, INF corrections, and of course, no missing files causing symlog.txt to exist.
You still get symlog.txt in BZ 1.4O if you play soviet campaign, or go to multiplayer and cycle through all the maps.
I currently replaced MDM with mortar and decreased ammoCost to match MDM, but I'm considering doubling the shotDelay.
Anyways, I make no promises on releasing a BZ mod, but I AM experimenting. I play through entire NSDF and CCA campaigns, even drive around on multiplayer maps, and no symlog.txt.

If we can't have 1.5, why not 1.41?

If I designed an installation program for it, it would be small installer and require BZ 1.4 to be pre-installed. It would have a way of finding your BZ 1.4 directory, making a copy of entire BZ folder as "BZ 1.41" directory or something, and then applying modifications to appropriate files. This way you don't have to manually copy your render.cfg or any custom files like sniper scope mods, and your original 1.4 game is unmodified. You will not be forced to 1.41, you will be able to keep original 1.4.

Again, this is still speculation and experimentation. Can't hurt though.
EDIT:
1.41 is no longer a mod, it is "1.5" minus the code fixes.