Concensus on this and at England has been for the escutcheon of the original arms to be used in the info-box. We have had a stable situation on this issue for months and the change being suggested was discounted on several previous occassions:
Talk:Scotland/Archive_20#Coat_of_Arms
Talk:Scotland/Archive_4#UK Coat of Arms or National Coat of Arms?
Talk:Scotland/Archive_4#Scottish Arms or UK Arms - discussion at UK wikipedians'
Talk:Scotland/Archive_4#Edit war - coats of arms - RfC
If people insist on placing the version of the UK arms used in Scotland in the info-box to symbolise Scotland then perhaps they'd be good enough to alter the info box at England and Wales and argue their case for change at those articles also. Furthermore, so as to avoid any confusion, why not change the name of this article to "Scotland (United Kingdom)" just so as to avoid any possible confusion? 

Would those pushing for change like to alter the Kingdom of Scotland article info box to reflect the arms used up to 30th April of 1707 also?