Kristian Dacey, Tomas Francis, Cory Hill and Gareth Davies were called up by Gatland from the Wales squad which beat Tonga on Friday and Allan Dell and Finn Russell from the Scotland team that beat Australian on Saturday.
The New Zealander made his comments ahead of the Lions match against Waikato Chiefs on Tuesday but they were aimed squarely at Jaco Peyper, the South African referee in charge of Saturday's first Test at Eden Park.
That said, Farrell believes his work with the Lions defence is paying dividends ahead of the opening Test match in Auckland this Saturday.
After the final whistle the versatile Munster star commended his side's well-rounded, dominant performance and spoke of his pride to captain the Lions to such a handsome victory against a strong opponent in the form of the Maori All Blacks, who simply couldn't live their opponents in the second half.
All that is starting to feel like a false promise and the Lions could just as easily have come with 30 players at the start of last week, played the New Zealand Maori as a warm up and then got into the tests.
Whether Jones would have been happy to lose, say, Hartley and Danny Care when he only has one other hooker and scrum-half in Argentina we can't say, but there is enough cover there at lock for Launchbury to head over.More news: London Mayor Calls On Gov't To Cancel Trump's State Visit
"It makes it hard to complete attacking opportunities and situations because there is so much happening off the ball in terms of holding players".
Maor to come When is Lions vs Maori All Blacks, what TV channel is it on and who is in Warren Gatland's squad?
"We won't sit down and pick the (test) team until Wednesday and I think that's only fair on the players that are taking the field on Tuesday", Gatland told reporters in Hamilton. You play the fine margins and if you play to those limits I don't see anything wrong.
"It was pretty good".
The Maori game had been expected to be an unofficial fourth test and the first half had been tight with the Maori in the game courtesy of loose forward Liam Messam's try and a conversion and penalty to flyhalf Damian McKenzie.
The Maori stunned the Lions 19-13 some 12 years back, but here the tourists wrestled their hosts into submission.
Farrell coined the phrase "enjoy and destroy" during a 2013 Lions team talk in Australia and he likes the response he is getting from the current squad as they prepare for an even bigger defensive challenge over three Tests.
"I think we built on the Crusaders performance tonight in terms of the scrummaging was very solid".