Lot's of theories, and I can't recall all, but one thing I can recall is that Bob's philosophy for ODI (In fact cricket) was that you have to be at least 2 dimensional cricketer - that's batsmen has to be some sort of bowler, at least brilliant fielder, and bowlers has to bat a bit - overall everyone has to be good in field. This wasn't a bad strategy for his other teams, but PAK's cricket philosophy is different.
So, one by one PAK team started to become a bunch of jack of all traders - apart from few individuals like Inzi, MoYo, Shoaib - he actually even tried W Keeping with YK, batted Mian Malik at 3, played MoHa, Afridi, Malik, Razzak, Rana, Mehmood, Kamran (as opener), tried Rao Ifti over Asif in ODI ..... Bob always liked dible-doblie all-rounders or spinners who can bat - he even tried Derek Crooks for 2/3 years, because the guy could bowl part-time offie and bat a bit AND he could field, 2nd in that SAF side!!!!!
This was quite an effective strategy for SAF team under him which had almost or better than 4/1, W/L ratio in ODI. But, his teams were built on combination and synergy among several good cricketers, rather than individual brilliance - this was probably the main reason that almost every Woolmer's team failed in crunch matches - that SAF side, PAK side .... I think sometimes in 1995 or 1996, Warwickshire lost a League Final to Lancashire - driven by one of the best ever List A innings in UK, 118 (?) by Hari De Silva and the bowling side had no clue how to stop mad max that day.
He dropped Donald for WC QF at Karachi for Symcox, who could bat a bit and WI had about 5/6 lefti in their line up; but cricket being a specialist game, it was ironic that BC & Siv Chandra put run a ball 170+ for 2nd wicket to set a match winning total (either side WI lost 10 for 89 or so), more ironic was Lara hitting Symcox out of attack, once hit 6 consecutive 4s, almost every time through the gap Cronje opened in channel for that ball.
This philosophy actually delayed Ajmal's career, prematurely ended Kaneria's ODI career as well and availed MoHa 50+ PAK cap for his tail-ender like batting stats and 6th bowler chucking option - first thing Henry did aftr joining was to off load PAK from bits & pieces syndrome and that team made the T20 WC final with 6/7 specialists in a T20 match - this is a fundamental difference between cricket philosophy of ENG & AUS. Unfortunately, Arthur has picked that part from Woolmer's book, which cost PAK so far 2 Tests against this ATG SRL side - that too in UAE and it'll continue to cost in Asia against any Asian side.
I think, with his fielding, fitness and absolute lack of bowling skills, cost Butt a spot in Woolmer's ODI thoughts, but I might be wrong.