FWIW I found the Explore Scientific eyepieces to be excellent as well and can't understand why anyone would spend the extra for a Televue.
I accept you would get a Televue if there wasn't an ES equal (eg 3-6 Nagler zoom). However I had a 13mm T6 Nagler and it was a brilliant eyepiece! Only problem was I also got a ES 14mm which was just as good and barely cost a $120 2nd hand!
Maybe others can see differences and know something special and what to look for but I suspect the other 85% of people would be happy with an ES. I only hope ES prices don't creep up. I suspect the only reason we have a Televue special on T6 Naglers is due to the Explore Scientific range.
Bottom line is monopolies are very bad things for consumers and whenever possible people should try to break them - this translates to giving support to Explore Scientific wherever possible
Finally I have no relationship with either company - in a choice between a Televue or Explore Scientific I pick a Takahashi LE every time