Personally I dont mind if its the default or not and I dont judge things unless i try them for a considerably amount of time.
Pharo is not and will not be begineer friendly for at least the not so distant future. Its not a matter of whether the GTDebugger becomes the default or not.
There are a lot of issues Pharo has to face like most small community projects:
a) Lack of substantial documentation
b) Complete lack of begineer orientated documentation
c) Lack of substantial begineer friendly libraries
d) Lack of Libraries in general
e) Small community with limited support
f) Lack of support of other languages
g) Completely diffirent coding paradigm from familar approaches
etc etc
Python is an excelent example of a programming language which is probably the most begineer friendly out there and the one that I recommend the most, for one new to coding and ones coming from another language.
Unfortunately begineer friendly approaches on IDE and language level require big resources that pharo does not possess. For me pharo is an advanced coder orientated tool, with a steep learning curve,�� targeted at coder already familiar with OOP and the pitfalls of regular coding with considerable experience that look for a new way of coding that is radically different to what they are used to.
Again I cannot really say if the old debugger is more begineer friendly than the new, I will have to try it for a week to offer an educated opinion.
Also as I have already said I will be building my own workflow and guis with pharo because in many cases I dont like the design of old and new pharo tools, so for me at least I dont care if GTDebugger will become the default on this release or the other, what I do care is that is moldable, a design I have praised Spotter as well about, which means its easier for me to change take off its GUI , use my own GUI in place and maybe customize it a bit here and there.
Thus I wont be pushing for anything since I will be fine with any scenario as long as the new debugger is integrated.