"[Tom] was a left-field selection and hasn't come through the schools programme. But he was busy and abrasive," said Boyd.
Jackson Garden-Bachop, son of former All Black and Manu Samoa first five Stephen Bachop, came on at second five, while McKenzie, another potential No10, appeared at the back.
"What we find is that these boys are [just] 18-19 playing against these [franchise] development sides.
"That extra two to three years makes a massive difference to their physical development. These are good match-ups for us," added Boyd.
Lienert-Brown said the game was a solid launching pad for the squad's Junior World Championship campaign, which kicks off on June 2.
"These days in camp have been really important to put the training out on the park. The Blues brought a physical battle, so we definitely got some good stuff out of it," said Lienert-Brown, who has been happy to impart some of his Chiefs' experience and knowledge to the squad.
"We strung together some really good phases for the tries."
There will be no relaxing weekend for the squad.
Today will be a full review of this match, complete with one-on-ones, while Sunday sees two more trainings, as has been the case most of the week.
"We haven't had much chance to breathe yet," said Boyd. "We've double-trained because we've got so much content to get through."
Happily, there were no casualties out of the match, though apparently manager Paul McLaughlan tweaked a hamstring.
The New Zealand Under 20s are gearing up for the Chiefs Development XV on Wednesday in Mt Maunganui, while the Blues Development XV face the Samoan Under 20s, coached by former Manu Samoa captain Semo Sititi, on Monday.