I think it's a disgrace. Away fans have been given discount last time too, charity begins at home, your home support is your lifeblood away support is secondary. Another own goal in my book...
I think you'll find the away support is hardcore fans. It takes a lot to travel all over the country in mid-week, take time off work, etc to follow your team. That's why the atmosphere is always better at away games, I would have thought you'd understand this given you dislike for 'tourists' who would only have the opportunity to attend Anfield.
Its a good measure taken by the Premier League and it should be applauded and welcomed by all football fans.