You say your trailer is heavier and longer than the previous one but did you use the same WD BARS and hitch? If so it would be a good idea to check the bar strength to be sure they're correct for the new tongue weight. Bars that are not stout enough can make for a lot of bouncing and poor performance. I recommend sizing the bars at 15% of the trailers GVWR which is the maximum the tongue should ever weigh. Size them for that weight (close as possible) but not under it.
You can likely add a duel cam system to your standard weight dist system and that's about as good as a reasonably priced system gets. Sigle friction bars are adequate for smaller trailers (usually below 25 feet) but not for longer and heavier units. Even adding a second friction bar applies FAR less force than the Duel Cam or the Equ-al-izer. Been using my Reese for the last 80,000 towing miles with no problems. Do remember though that correct adjustment of the hitch is just as important as having the correct size.
Good luck / Skip