I was talking about from the DM side of things. Much easier for a DM to allow an extra than to take away something already there. I do agree it's easier for the PCs the other way around, but again, I'd say presenting PCs with difficult choices when picking archetypes is a great feature of 5e and moving this ability to Beast Conclave only furthers that goal and is thematically appropriate. Yes all rangers can speak with animals (if they take the spell), but only the Beast Conclave is so good at it that they don't have to expend additional resources to do so.
But it forces anyone who wants to play a ranger that is experienced with dealing with animals to use the beast master, meaning they have to have a pet. The spell isn't the same thing. It's not experience in dealing with animals, it's a magical ability to use telepathy with animals, a few times a day. Thematically, those are
wildly different.
Leaving it as a core feature allows for Hunters and Stalkers who can calm a beast more easily than a Fighter with Handle Animal could, which makes sense, but also allows the character to ignore the ability, because it's mostly a ribbon, unless you also take Animal Handling.
I do think BM rangers should get an extra benefit, perhaps just auto training in Handle Animal, and Advantage on checks with it to deal with animals of the same kind as your beast, or something.
But the basic, "Wait guys, I've dealt with this sort of thing before, let me try to calm her down." when the party encounters an angry bear, should be a basic part of the class, because it's a core concept of the Wilderness Guy, and it isn't necessarily a magic ability.
At most, I could see making it an optional ability, that can be eskewed in favor of a couple other options, one of which is more appropriate for an Urban Ranger.