I think this would better if it lasted less, such as only 30 seconds, as it would increase camping and make the game annoying for other players. This should also temporarily remove all armour that the person has. Overall, it’s an interesting concept.
That would be too overpowered. Maybe you can make the time to hide be ten seconds and after that you will be switched to your Minecraft skin/Hive Costume. And your opponent can search you like seekers do in normal HnS. Thank you. Also your armor will be retained when u switch to a block and when you switch back to your normal skin/costume.