Jaeger light infantry are great adition to your army and synerzise really well with volks because they have a sniper rifle that snipes any model below 70% of health. Volks have high DPS to hurt models with their STGs and then JLI snipe wounded from behind the volks.
Ostwind is a really good call-in in current Light vehicle meta. First you can go double Luchs or Luchs + Puma to put huge amound of pressure on your opponent. Then at 8 CP (because you´re very agressive your CPs are acquired faster) you call in Ostwind medium tank that hardcounters infantry and light armor alike to win the game.
This build is very popular against the British Forces because they lack A) snare to soft-counter light vehicles (AC is hardcountered by Puma) B) they lack any 8CP medium call in tank (Valentine doesn´t count as it´s a joke on wheels )
Against Soviets and especially USF this build (and so the commander) become less and less used because Allied players learned how to counter this - M10 spam and Lend Lease Sherman is no the meta and both these vehicles counter infantry and Ostwind alike (well M10 only to some extend but USF player also can call in Bulldozer Sherman).
Anyway this commander is still great punishement against USF players that refused to go Armor Company - once you see Smoke offmap drop or Ranger you will know he picked Pershing Commander and so the Scavenge commander is a great way to punish him for not going M10.
The infiltration grenades are very cheap (15 munnition) and nuke any wooden house. They are very strong against maxim spammer players or against UKF (his IS need to stand still, UKF players use Vickers ...)
All other 2 abilities are meh -thorough salvage is more of a debuff than buff because usually you want to remove a team wapon from map with salvage and now the salvage takes much longer so its riskier, Artillery strike is nice but you wont build your 1v1 strategy around an offmap artillery strike.
CONCLUSION: Scavenge Commander was very strong before last patch because everyone was either going Brits, Maxims or Pershing and he countered each of these. Now he is still a great 3rd commander in your roster but he isnt your primary pick in most situation - Special Ops is much safer against meta Sov/USF - you can use infiltration grenades as well + Command Panther hardcounters M10/Lend Lease Shermans.
Hope I helped you, feell free to ask if you have any questions (eg what commander should I use in what situation ...)
Cheers
Hector
Quality answer as always Hector!
I'll keep this in mind next time I'm facing off against a brit player (Although I seem to only be meeting soviets atm..)