As much as I hate to admit it Triumph are falling behind the Japanese brands in development of their bikes.
Boneville - Basically unchanged since the EFI changes.
Rocket - Basically unchanged since the Roadster got ABS, and even that was a small change from the R3s before it.
Thunderbird Series - Nothing compelling to get HD riders on it as an alternative, including price, and not much has changed since I troduction.
Daytona 675 - Very small incremental changes over the years until 2013, even then the difference to the rider is tiny vs the 2006-2012 models. Lacking most of the electronic sex found on jap premiere sposport bikes.
SPEED Triple - Essentially identical in character from 2003-2010 and still the 2011 was really just a update to the frame and some mechanicals. The engine is mostly unchanged since I think 1998.
The two models that have gotten a lot of development, the tiger and trophy, do stand out against their competition.
When Triumph started back up they said they would focus on their core bikes, the speed triple and daytona, and expand from there into market niches not already filled. They have done so successfuly, but competitors have now out niche the niche bikes in some cases, and Triumph has sat on their hands instead of updating to compete. Big mistake in this industry!