A Celtic Nations Soccer Side?

Would it be good to have a combined Celtic Nations soccer side in a friendly made up of players from Scotland, Wales, Northern Ireland, the Republic of Ireland, Cornwall, the Isle of Man, and Brittany?

This would be like the British and Irish lions rugby union side, but in soccer. It would be like the West Indies cricket side, which is a composite cricket side made up of different nations. 

A composite soccer side made up of different nations has not been tried that often. 

I would still support the Celtic Nations having their own teams if they want.

As a Scot I want Scotland to continue to have their own side. But a combined team of Celtic nations would be fun in a friendly.

But a united Celtic Nations idea would be a fun experiment and novelty to try. 

The Celtic Nations united side could play against major European or South American nations, 

If it is too much pressure on the fixture list, then the Scots, Welsh, Northern Irish and Republic of Ireland could go without a senior international that day or week. While the trick could be to have the united Celtic Nations soccer side to play a game against a major nation, then a day later for the B teams of Scotland, Wales, Northern Ireland and Republic of Ireland to play one of each other, so the other international players could get game time. 

A united Celtic Nations team would be fun,

It could be tried at male and female soccer. 

It could even be tried at different age ranges. So there could be a united Celtic Nations under 21 side in a friendly. This could give the players that take part a chance to play with the top players of each Celtic nation. You would expect the team to be of a higher standard than the individual nations.