There were a lot of positives to take out of Rangers comeback win over Kilmarnock, however, there will have been a few too many negatives too – the performance of Ross McCausland being one of them. The 20-year old will only be able to use his age as an excuse for so long but when he has Oscar Cortes on the other side looking a constant threat, it doesn’t look good for him. Rangers manager Philippe Clement is clearly a fan but, if Ross McCausland wants to have a long term future at Rangers, these are the games that he needs to make a difference in. Rangers need to have a rethink with Ross McCau…