Wizard,
” how many shittos can you provide a citation/maare makom to that disagrees with Rav Dessler zt’l”
This form and thread is beyond the scope of this sensitive subject However, lets put it like this, Rav Dessler’s shitah (and his Son in law) is a new concept and Chidush – something that has historically not been said until recently. Anyone a bit familiar with the subject will tell you the same . There were major differences in the Yesodos of Kabalah. ( Tzimzum etc. though, nothing that pertains to us simple folks – all the rest are shtusim)
(I recall the Rebbe of Chabad also wrote something like it regarding The Nefesh haChaim and the Tanya regrading ‘Tzimzum’ – ..? ) .
If you want to know a bit more see the following link regarding the Nefesh HaChaim and the Ba’al HaTanya:
http://hebrewbooks.org/pdfpager.aspx?req=47644&st=&pgnum=447