We already have our version of Ryan Anderson: the recently re-signed Donta Hightower. At the moment, we need a Coverage LB more than a Hightower backup, and because we have so many fewer picks than we are used to having, we have to prioritize our available resources more than we did so in the past. Same goes for Tomlinson, whom I also like; but we have a greater need for a DE than for another 0/1-tech DT.
What I meant was that I "like" Tomlinson and could see him as a Pat, not that I'd draft him this year. A young, solid DT like Tomlinson would be a pure luxury pick.
However, I see Anderson as being a potential replacement for 33-year-old Nink (who's UFA at the end of the year) - a solid, generalist OLB/DE type for the side opposite HT. Ealy may be capable of covering at least some of Nink's role and skillsetfor 2017, but he could walk at the end of the season.
Anderson, OTOH, would give the Pats four relatively inexpensive years (out of the 3rd round), provide additional leadership to the off-the-ball crew, and allow both HT and Ealy to drop down to the line more often, thus alleviating the thinness at DE. Anderson is also pretty decent in coverage, though not a "coverage LB", per se.
Meanwhile, aside from HT, the off-the-ball crew doesn't seem all
that solid to me. Van Noy seems pretty good, but he could also walk at the end of the season. Freeny and McClellin are "okay", but Roberts has been limited as a two-down run-stopper so far (though he could progress). So, adding Anderson would be a general, long-term upgrade to the LB corps.
In terms of coverage LBs, there's the uber-athletic Trevor Bates from the PS (snagged from Indy during the season last year), and the Pats have worked out a couple-three LBs with proven coverage skills who'll likely be available fairly late (e.g., Eric Wilson).