... not the usual disclaimer this time. I am definitely not responsible for the opinions expressed below.
Ross at Play
DO YOU HAVE ANY FACTS TO SUPPORT THAT?
Sejintinej asked a legitimate question and all he got was a lot of blowhards spouting off guesses as if they knew the answer. I quote actual evidence and get insulted for that - I was not drunk, it is 359 months since the last time I was drunk. On the other hand, your opinions on many subjects are obviously worthless, whether you're drunk or sober.
My guess is ignorance will win out in the long run, and eventually use of 'a couple' without the mandatory 'of' will be considered acceptable, but I have found four references and all suggest a large majority would still consider "a couple more goals" is poor English, wherever it is spoken.
Consider the distinction between 'couple' and 'few'. You could say 'a few goals' or 'a few more goals' - but would you say 'a couple goals'. You cannot say 'a couple more goals' either; the usage of the phrase 'a couple of' DOES NOT CHANGE simply because you add the word 'more' to the beginning of the noun phrase it precedes.
Do you want any more evidence? How about what dictionaries say?
Dictionary.com provides this definition of an idiom at #14 for it's entry on 'couple':
a couple of, more than two, but not many, of; a small number of; a few
It will take a couple of days for the package to get there.
A dinner party, whether for a couple of old friends or eight new acquaintances, takes nearly the same amount of effort.
Or perhaps, this definition of 'couple (noun)' from the Oxford Advanced Learner's Dictionary:
In British English a plural verb is usually used in all 3 senses.
1 [singular + singular or plural verb] couple (of something) two people or things
I saw a couple of men get out.
2 [singular + singular or plural verb] couple (of something) a small number of people or things
SYNONYM a few
a couple of minutes
We went there a couple of years ago.
I've seen her a couple of times before.
I'll be with you in a minute. There are a couple of things I have to do first.
There are a couple more files to read first.
We can do it in the next couple of weeks.
The last couple of years have been difficult.
3 [countable + singular or plural verb] two people who are seen together, especially if they are married or in a romantic or sexual relationship
a young/an elderly couple
Several couples were on the dance floor.
The couple was/were married in 2006.
Oxford Advanced Learner's Dictionary 9th edition © Oxford University Press, 2015