What card would you replace for a second muster?
I took one out for ooze since I was tired of seeing weapons.
I had an owl before, but its purpose seems to be only for silencing. It's so useless as a minion on the board due to 1 health. I replaced it with Spellbreaker, so I could actually kill something.
Spellbreker in paladin is weak mostly due to the contested 4 slot, paladin runs tons of 4 drop cards. You only play owl for the silence yeah, in most cases that 2/1 silence goes much farther than just hero powering that turn and is even valuable late game for just 2 mana.
I would probably cut loatheb for the second muster, I'm assuming you don't have access to sylvanas or the Harrison just yet so you need the ooze and the golem to fill the slots, once you get those cards, there are those replacements basically.
Tirion is obvious, not having these 3 cards makes your late game a good bit weaker than the average midrange paladin, so I say you focus on your early game by swapping the loatheb out.
The other option is dropping a chow but they are very strong in an early game centric deck like midrange paladin, however as I stated your late game is weak at the moment so it's up in the air.
Everything else I did not mention looks fine , blessing of kings is being used in every top midrange paladin currently as xzirez hit rank 1 with a deck that played it causing people to try it and actually like it since the card has great synergy with mini bot and is some extra burst for a deck that has next to none.
The 1 draw card is extremely common for paladin as well, this is due to the fact that paladin runs many straight value cards that either use their potential effects on the spot or are just sticky, this is the same thing as a hunter build basically.
Few people play argus/acolyte but that is quite rare these days, the equivalent would be seeing cult master/snake trap in midrange hunter, which is also rare for the same reason.
Tirion is next to dr. Boom as one of the 2 most value legendary cards in the game.
He's huge silence bait simply because of how much value he generates you, even dodges bgh.