Should we just do away with offside altogether if this can be called a perfectly legitimate goal?

It would seem it is now down to the guy with the whistle to make the decision as to whether the player is "interfering with an opponent", putting more pressure on him to call it right, which he will probably get wrong more times than not, with most refs calling offside to err on caution.

Looking at the still the celtic player looks offside, he looks to be "interfering" with the goalkeeper, (ohh matron ), but I am told he is onside by many, yet a few months back he would have been a mile offside.

Mibbe we should do away with these stupid rules and just have a 10- 21er or play for two hours with the last goal the winner?