One "detail" that seems quite important when analyzing the structure of human dispersal are those moments of sudden very dynamic expansiveness that leave a mark in form of star-like structure, that is when many subclades diverge from a common core node. This is a clear signature of very rapid expansion.
Following the phylogeny, I can detect the following star-like structures in human mtDNA:
These are only two: M and H.
M has 43 basal sublineages and surely signals the beginning of the Great Eurasian Expansion after the out of Africa episode.
H has 34 basal sublineages and may signal the colonization of Europe arguably.
There are three star-like structures with 15-16 sublineages. These are R, H1 and D4.
R has 16 basal sublineages and seems to mark the final episode of the Great Eurasian Expansion.
H1 has 15 basal subclades and would seem to be the largest continuation of the H expansion in Europe.
D4 has 16 basal subclades and would indicate, along with other lineages the colonization of NE Asia and eventually America as well.
Additionally, macro-haplogroup N, with 12 branches, can also be considered in this group, participating in the Great Eurasian Expansion, along with its "sister" M and its "daughter" R.
I arbitrarily decided that the smallest size for a star-like structure in this mini-research would be of 5 sublineages. Why not 4 or 3? Just because I'm lazy enough. You can if you wish consider those as "tiny stars" or whatever but I'm not bothering listing them here.
Hence my small stars have between 5 and 9 basal branches. I have found a good deal mtDNA structures of this kind and will list them with a geographic logic:
In Africa we find only four of these star-like structures, all small. They are L3 (7 branches, two of them being the Eurasian macro-haplogroups M and N) and its subclade L3e1 (Central and East Africa), L1b1a (West Africa mostly) and L2a1c'd'e'h'i'j'k (East Africa basically). All them but L3 have just 5 branches. The lack of many and large star-like structures suggests that the demic growth in Africa was pretty much continuous, without many sudden expansive episodes like those we can detect in Eurasia, surely as signal of colonization of new frontiers in most cases.
In South Asia there are just three small stars: M4''64 (7 branches) and its sublineage M30 (5). Also M5a (5 spikes). M4''64 and M30 were probably sequential "aftershocks" of the M explosion itself. M5 instead seems more recent in time to my eye.
In East Asia, Siberia and/or America I find 7 star-like structures, which are: A (7 branches), M7a1a (7), C1b (6), D1 (6), D4a1 (5), D4h3a (5) and Z1'2'3'4'7 (5). All but A are derived from macro-haplogroup M (subclades: M7, M8 and D). Also all seem related to the colonization of the Northern fringes of Asia and/or America itself (except M7a1a1 if you wish, that seems mostly related to Japan instead).
It gives the impression that, barring macro-haplogroup N as such node, there were no large sudden demic expansions in South East Asia but rather a scatter of colonizations by diverse groups, leaving the signatures of rapid demic expansion for when some of these groups finally faced the Far North or the American new frontier: D1, D4h3 and C1b are exclusive of Native Americans.
In West Eurasia (and in some cases also parts of Africa or America) there are a lot of small stars, exactly 18: J1c (8 branches), H3 (7) X2 (7), T2 (7) and its subclade T2b (6), HV (6) and its subclade V (9), U5b3 (6), U6a (6), M1a (5), H1b'f'g'k'q (5), H2a (5), I (5), W(5), U2'3'4'7'8'9 (5) and its distant sublineages K1a1 (9) and K2a (6), R0a2 (5).
One third of these starlike structures belong to haplogroup R0, being surely related to the impressive spread of haplogroup H. Almost as many (5) belong to its "sister" haplogroup U, which probably spread in parallel, in my opinion.
In Oceania we only see one starlike structure and corresponds to haplogroup P (7 branches).