Eh he was on a slightly better than 40 point pace( with powerplay time) when he was moved, most people hated the trade at the time
Edit: i see you specify "at that point" I just think its a weird call to even slightly defend one of the worst trades ever.
To be fair, Erat was on pace for 60+ points and 20+ goals the two seasons prior, during a low scoring era and on a Nashville team with no offensive stars. Washington was hoping he, next to Ovechkin and Backstrom, could bounce back to a 60 or even a 70 point pace. Meanwhile Forsberg was not exactly considered a blue chip prospect.
Yes, in hindsight the haters of that trade ended up being right. But at the time it was made, it was nowhere close to one of the worst trades ever. A lot of people, especially newer fans, laugh at the trade thinking Erat was just some bum when he was actually a very good player for a long time. One of the best in the young Predators history actually.
In hindsight, it's easy to sit here as a fan saying "I knew Forsberg would become this good", and that "I knew Erat would suck in Washington and they wouldn't win the cup". Imagine the reactions if it was Nail Yakupov who was traded for Erat. Today no one would've cared.