I discovered a "fun" spigot leak over the weekend and wanted to check with the Reddit hivemind before repairing. The copper feeding the outdoor spigot appears to have burst. It sprays water when the spigot is turned on. The water feed is Pex B -> galvanized steel -> PVC (lower tee goes underground to outbuilding, right piece has two 90s to spigot) -> copper -> spigot. The Pex B is 1/2". Is there any downside to just replacing the entire supply line with 1/2" Pex B and installing a frost-free sillcock? It seems like this is a good chance to just get rid of the galvanized steel and simplify the water feed. Thanks for any thoughts or suggestions.

I discovered a "fun" spigot leak over the weekend and wanted to check with the hivemind before repairing.
The copper feeding the outdoor spigot appears to have burst. It sprays water when the spigot is turned on.
The water feed is Pex B -> galvanized steel -> PVC (lower tee goes underground to outbuilding, right piece has two 90s to spigot) -> copper -> spigot. The Pex B is 1/2". 

Is there any downside to just replacing the entire supply line with 1/2" Pex B and installing a frost-free sillcock?
It seems like this is a good chance to just get rid of the galvanized steel and simplify the water feed. Thanks for any thoughts or suggestions.