Neither Heaven or Hell.

[heslopian]

I like the message of this poem, and there are some very good lines, but the syntax seems a bit slapdash, and the construction a trifle messy.

It may be the finest place to see In my opinion, this opening line doesn't really make sense. It reads like you were trying to compress all your thoughts into a straightforward sentence, but in doing so produced the exact opposite: a strangely convoluted one. Would it work better as something like this: "if that's where all the sinners go/it's where I want to be"?
if that’s where all the sinners go;
to wait while others of a much more
steadfast nature flow
in holy equilibrium
through Peters pearly gate. Love the idea of flowing in equilibrium, but for me this sentence just goes on and on. Would it work better as: "while those more honest than myself/flow in equilibrium,/massed at Peter's pearly gate"?

“Afraid not you
my dear chap, you sinned. "Afraid not you"? How about something like: "Halt where you stand,/you gross scoundrel." Don't think you really need "you sinned." Removing it might make the line a wee bit more subtle.
if it were only up to me!
The boss has said for you
it cannot in a month
of holy Sundays be. I think you sacrificed cohesion in order to create a rhyme here, a cardinal sin in my book. Also, like with the last line of the first verse, this seems too elongated.
You have to make up
for past deeds
returning here upon another day” Same problem. Too long and confusingly put together. How about something like: "before entrance you must atone,/return when your sins are cleansed."

For sinners such as me
and friends who
sinned beside my soul
there is no finer place to be. Excellent. For once the elongation and odd syntax works, and doesn't trip me up when reading. Though I'd recommend placing a word comprised of two short syllables before "sinners such as me." "Wicked," perhaps.
than purgatory
tight and full to overflow This finale seems unnecessary (IMHO). I'd recommend changing the title to just "Purgatory" (unless you want to be subtle) so the audience know what you're talking about, and ending the poem with the previous line.

Sorry if my critique reads like a mean, brutal rewrite. I think this poem has promise, and the occasional witty remark (such as we expect from a Marsland poem) but needs extensive editing.