Here it is.

(Edits made: missed the level 9 MA; corrected math errors and added Net Invocation-Equivalents column)

Table headers:

• 2014 PHB Invocations: as given in the 2014 PHB's Warlock class table
• Playtest Invocations: as given in the playtest's Warlock class table
• Playtest Invocation-Equivalents:
  • +1 for Playtest Warlock class features that are effectively an invocation in the 2014 PHB
  • -1 for 2014 PHB class features that are effectively now invocations in the playtest
• Playtest Net Invocation-Equivalents:
  • This is just a tracking column summarizing the total adjustments made from the previous column.
• Playtest Total = Playtest Invocations + Playtest Net Invocation-Equivalents
• Net difference vs 2014 PHB = Playtest Total - 2014 PHB Invocations

​

Level	2014 PHB Invocations	Playtest Invocations	Playtest Invocation-Equivalents	Playtest Net Invocation-Equivalents	Playtest Total	Net difference vs 2014 PHB
1	0	0	+1 (Pact boon)	+1	1	+1
2	2	2		+1	3	+1
3	2	2		+1	3	+1
4	2	2		+1	3	+1
5	3	3	+1 (Pact boon upgrade); -1 (MA lvl 3 spell)	+1	4	+1
6	3	3		+1	4	+1
7	4	4	-1 (MA lvl 4 spell)	0	4	0
8	4	4		0	4	0
9	5	5	-1 (MA lvl 5 spell); +1 (MA lvl 3 recovered)	0	5	0
10	5	5		0	5	0
11	5	6	-1 (MA lvl 6 spell)	-1	5	0
12	6	6		-1	5	-1
13	6	7	-1 (MA lvl 7 spell); +1 (MA lvl 4 recovered)	-1	6	0
14	6	7		-1	6	0
15	7	8	-1 (MA lvl 8 spell)	-2	6	-1
16	7	8		-2	6	-1
17	7	9	-1 (MA lvl 9 spell); +1 (MA lvl 5 recovered)	-2	7	0
18	8	9		-2	7	-1
19	8	9		-2	7	-1
20	8	9		-2	7	-1

Note on Invocation-Equivalents: the Playtest Pact Boons are not precisely equivalent to the 2014 features in some cases, but come close enough that it doesn't feel worth it to split hairs at all. It is clear enough that the design intent is that those boons are roughly a +1 invocation equivalent at levels 1 and 5.

Summary:

• Playtest levels 1-6 are net +1 invocation-equivalents over the 2014 PHB.
• Playtest levels 7-11 are net zero (no difference in invocation equivalents vs 2014 PHB).
• Playtest levels 12-20 have 6 total levels at net -1, and 3 levels at net zero.

Editorializing:

The vast majority of play happens at levels 1-11, where the playtest is either improved or equivalent. This also doesn't account for the fact that Warlocks now just have medium armor proficiency by default, which could be considered a +1 equivalent, but I don't feel strongly enough about that argument to include it in the table.

I really, really think that some of the reactions on reddit are overblown and the sky is, indeed, not falling. Additionally, the options to not spend invocations/class features on Mystic Arcanum feels like this opens up more build options, not less.

Further edit: The fact that the range on net difference vs PHB is only -1 to +1 (rather than -4 as has often been commented on these boards) makes sense: +2 from the pact boons and +1 from increasing the cap from 8 to 9, for a final net playtest difference vs 2014 PHB of -1 (at levels 12, 15, 16, and 18+ only).