Can I use modified playtest characters in my 5e game?

I understand that some of the information will change, and that there are some important differences between the last playtest package and the basic rules.

For player characters I see the major changes being proficiency modifier is higher at level 1, more skills from background and less from class, and more money being dumped in to the gear from backgrounds (making starting characters that use the packages far better off in their initial gear than those who don’t).

My question is, “If I take the above things in to account, can I use the classes, builds, and races listed in the last playtest reasonably until the PHB comes out next month?

They seem mostly compatible with small alterations.