I almost always re-accessorize bins to some extent including modifications of OEM and switching straps, cases and lens covers between brands and/or substituting after market accessories. As a single example the Zeiss Terra 32mm objective covers work well as a rainguard on my 12x32 Canon 12x36 IS and my wife's 8x25 Canon IS.
It does seem to me many people underestimate the value of fine tuning accessories and as Lee points out elsewhere in this thread, no manufacturer can please everyone with a single package of accessories.
I find this very interesting. More than once I've thought about opening a thread where forum members could show their mix-match Frankenssories (more on that later).
Regarding the OP, unlike many here, I really like the pre-FP Swarovski strap (I think it's called LCS, stands for "lift carrying strap"). I think they're really very well thought out (unlike the FP which I find pretty useless and unnecessarily over-engineered).
I love the fact that the LCS uses a "button style" clip system, it takes exactly 1 second to do and undo (unlike all the fiddling involved to attach a classic strap). Then there's the fact that you can change from regular "neck hang" to bandolier style in 1 second, which is something I do quite often while walking on the field. I like it so much that I actually bought a second unit to use with other binos.
And now, coming back to the subject mentioned by Mike about re-accesorising binos. For example it's not unusual for me to carry the Nikon EII inside the Monarch 7 8x30 case, with the rainguard of a 8x42 Zeiss Conquest and the Swarovski LCS strap. See attached. Isn't it nice?

(yes, for those with an eye for detail, the small cord attachment for the rain-guard comes from the stupid objective cover of a Zeiss Conquest HD).
On the subject of cases, my all-time favourite is the case of the Nikon Monarch 7 8x30. It is small enough to go unnoticed in a daypack but large enough so that I've accommodated an Ultravid 7x42HD, for example, besides my usual everyday binos like the ELSV 8x32, the EII 8x30 (I place it sideways) and the Opticron Traveler ED 8x32. It has enough cushioning and protection and, most importantly, the belt loop is the best I've experience, it remains still (for example, the belt loop on the case of the Kowa BDXD 8x32 is so poorly designed that the case swings as you walk, terrible).
Regarding the accessories of Swarovski, not only do I find the FP system simply unnecessarily over-complicated, but the rain-guard is just a pain, and the case... it's enough to say that the SLC 8x42 uses the same one, it's huge, and doesn't come with a belt loop, something essential in a 8x32 IMHO.
So, there you have it. Show us your Frankenssories!!