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I'm just starting on a fresh conlang at the moment. Its sound is mostly based on Japanese and Swahili with occasional German consonant clustars, but its word formation is heavily influenced by German in that it forms long and complex compound words.
I'm starting to think that these compounds are getting too long and unweildy though.
Below is a sample that demonstrates what I mean. The first words are mostly roots, the second set is some of the compounds that are made from them.

color Kari
Red a-kari
Blue ao-kari
Yellow mi-kari
Black schv-kari
White wi-kari

light juu
dark kuu

intense ja
neutral kaja
mild maja

matter lou
solid ma-lou
liquid wa-lou

temperature jin
hot he-jin
cold gn-jin

person wul
male klu-wul
female snu-wul

~~~~~
Kari base
green aomi-kari
intense green jaaomi-kari
dark dull green kuuka'aomi-kari
grey wischv-kari

Lou base
blood heja'awa-lou
water kawa-lou
urine miwa-lou
dirt/ground ami'aojama-lou
clay a'ami'aojama-lou
potter wul a'ami'aojama-lou

And that's where it starts getting rather unwieldy...

Another issue I have is a variant of the second person I'm thinking of including... It'd basically be designed for condescention and would likely be using the same base as the second person, but with a tone on the pronoun and a verb prefix, so it wouldn't be overly complicated... But is that unspeakably petty and snotty?

I like long Japanese words, because they usually have a nifty rhythm, and once you get a hang of the rhythm the word becomes a cinch to pronounce.

Hajimemashite! Doitashimashite!

Those are the longest ones I know. sweatdrop

Anyway, what you're doing is fine, but you will run into problems if you form all words like that. Complex descriptions and concepts will involve unnecessarily long words or words that are ambiguous.