I've never considered it a problem to clean from the muzzle. I often run a sovent patch thru the bore of guns that are fairly easily cleaned from the back end just for simplicity sake to get them soaking before a "real" cleaning. I just go carefully, guiding the rod with my bent finger if I don't have a bore guide handy. Yes, cleaning from the breech is easier, but not a huge issue to me either way. I havent had any huge gushers of crud end up in the action, even when cleaning my old 1886 Winchester after shooting black powder loads. Maybe I'm doing it all wrong,... I do hold the open side of an action down when cleaning from the front, and wipe out whatever does end up coming out, but it's never been a concern or problem. A couple patches or a piece of a rag in the action before running the rod thru helps catch the solvent that may run out if it's a concern.
Brass and aluminum rods can damage a abore. just because they are softer than a barrel doesnt mean they can't. Soft rods can pick up abrasive grit from the bore, or environment. There's been some discusion of aluminum rods oxidizing also. Aluminum oxide is a very effective abrasive, it's used for lapping and polishing metal. Just saying, all rods should be used with care, not gleeful abandon because they're "soft and safe".